Welcome to Basic Math Skills!

Size: px
Start display at page:

Transcription

1 Basic Math Skills Welcome to Basic Math Skills! Most students find the math sections to be the most difficult. Basic Math Skills was designed to give you a refresher on the basics of math. There are lots of mathematical questions on the exam. To you, the student, this means that you need to know math! We will cover the following topics: Chapter 1: Addition Chapter 2: Subtraction Chapter 3: Multiplication Chapter 4: Division Chapter 5: Symbols Used in Arithmetic Chapter 6: Fractions and Mixed Numbers Chapter 7: Multiplying Different Signs Chapter 8: Decimals Chapter 9: Percentages Chapter 10: Basic Algebra ANSWERS for All Chapters

2 Chapter 1: Addition Adding is when you group things together. It helps you find out how many things you have. If you have 4 pencils and someone gives you 3 more, you will now have a total of 7 pencils calculated as = 7. (+ is the arithmetic sign used when you add things together) For larger numbers, it is easier if you put them under each other. For example: if you have 102 of something (pennies) and someone gives you 405 more, you will have: pennies You start by adding the numbers on the right and work your way across, right to left. In our example, you first add 5 +2 = 7, then = 0, then = 5 to give you 507. When you are adding, if each addition comes to more than 10, you must carry the left hand number and add it on to the next column. Example: ,151 It is common to put a comma (,) after every 3 numbers, starting from the right. In our example, you will first add = 11, record the 1 and carry the 1 to the next column where you will now add = 15, record the 5 and carry the 1, you will now add = 11. Practice Questions =? ? =?

3 Chapter 2: Subtraction Subtracting is when you take things away from a group. It helps you find out how many things you have left. If you have 8 pencils and you give someone 6 of them, you will now have a total of 2 pencils calculated as 8-6 = 2. is the arithmetic sign when you subtract things from each other. For larger numbers, it is easier if you put them under each other. For example: if you have 505 pennies and you give 301 of them to someone else, you will now have: pennies You start by subtracting the numbers on the right and work your way across, right to left. In our example you first subtract 5-1 = 4, then 0-0 = 0, then 5-3 = 2 to give you 204. When you are subtracting, if each subtraction comes to less than 0: Example: You must borrow a 1 from the top number. In our example, 2 8 would = 6 because 8 is greater than 2. However, if you borrow 1 from the next number (the 1) and attached it to the 2, the 2 becomes a 12. The 1 therefore becomes a 0 (1 1 = 0). The 0 must borrow 1 from the next number (6) and when it is attached to the 0, the 0 becomes 10. Finally the 6 becomes a 5 (6 1 = 5). Therefore, our subtraction is 12 8 = 4, 10 9 = 1 and 5 4 = 1 to give us 114. Practice Questions =? ? ? people got on an elevator on the ground floor, 3 got off on the first floor, 6 got off on the second floor, how many were left on the elevator?

4 Chapter 3: Multiplication Multiplication is another form of addition. For example, 6 x 4 (x is the arithmetic sign for multiplying). Using addition, this is (6 times) = 24 or (4 times) = 24. In other words, 6 x 4 is the same as 4 x 6. You will notice that any number multiplied by 0, the answer is 0. Complete the rest of the table and check your answers. To understand basic math you must study the multiplication table and commit it to memory. x For example, let s multiply 43 x 56: 43 x 56 2,408 When multiplying large numbers by large numbers, you must carry the next number, just as you did in addition. Start by multiplying 6 x 3 = 18, record the 8 and carry the 1. Then multiply 6 x 4 = 24 + the 1 that was carried now = 25. Write down 25, so you now have 258 in the first row of the calculation under the = sign or bar. 43 x

5 Multiply the 5 x 3 = 15, write down the 5 under the second number of the 258 and carry the 1 43 x Multiply the 5 x 4 = that was carried and write down 21 next to the 5 in the second row. 43 x Now add the columns in the first and second row. 43 x ,408 The answer is 2,408. Practice Questions x 678 =? x 542?

6 Chapter 4: Division Division is the opposite of multiplication, so you must know multiplication to do division. Here are some examples of the different symbols for division: is the same as Here is our first example: 2,106 6 = 351 2,106 6 and starting from left to right 6 goes into 21, 3 times (6 x 3 = 18) and a 3 is carried to the next number 0 making it goes into 30, 5 times (6 x 5 = 30). The last number is 6, and 6 goes into 6, 1 times (6 x 1 = 6) so the answer is 351. You can check your answer by multiplying 351 x 6 = 2,106. In the example, 6 went into 2,106 evenly but sometimes there is a remainder. For example, 4,102 5 = 820 and the 2 is the remainder. The answer could be written 820 R2 or as a decimal.4 (2 5 =.4) (decimals are discussed in more detail in a later chapter). The answer can be checked by multiplying 820 x 5 and adding 2 for an answer of 4,102. Practice Questions 1. 1,002 8 =? 2. 4,004 4 =?

7 Chapter 5: Symbols Used in Arithmetic Sometimes other symbols are used in the calculations. Adding and subtracting are always + and. For multiplication, the following symbols may be used: x Brackets around numbers. o For example: (43)(65) means 43 x 65. o Most times brackets are used in combination with + or. For example (8 + 5)(6 3) means you should first add (8 + 5 = 13) and multiply that by (6 3 = 3) for an answer of 13 x 3 = 39. You should always do the calculation within the bracket first. * o For example 5*7 means 5 x 7 for an answer of 35. For division, the following symbols may be used: / o For example 18/3 means 18 3 for an answer of 6. A line may be used as a division symbol o means 4,278 3 for an answer of 1,426.

8 Chapter 6: Fractions and Mixed Numbers Fractions are used to represent parts of a whole. The fraction bar is the bar between the numbers on the top and bottom. For example: This fraction means 61 out of 82 or 61 divided by or 61/82 82 The top number is called the numerator and the bottom number is the denominator. You would never have a 0 in the denominator. This type of fraction is undefined and the answer would be infinity. Proper fractions have a numerator smaller than the denominator (e.g. 1/2 or 54/78). Improper fractions have numerators that are bigger than the denominator (e.g. 87/12 or 53/34). A mixed number is a whole number paired with a proper fraction such as 4 2/5 or 7 1/8. Reducing a Fraction The fraction 5/10 has the same value as the fraction 1/2. The numerator and denominator were both reduced by dividing each by 5. A piece of string 5/10 inches long is the same length as one that is 1/2 inches long. The fraction 40/60 has its nominator and denominator divisible by 20. When each is divided the fraction is reduced to 2/3 which is the same value. If the fraction 2/3 became 40/60, it would be said to have been augmented. Addition of Fractions In order to add fractions, they must have the same denominator. For example, it is easy to add 2/4 + 1/4 for an answer of 3/4. All you do is add the numerators (2 + 1 = 3). When fractions do not have the same denominator you must multiply both the numerator and denominator by the same number for each fraction. This is more complicated.

9 Let s do an example: Add 3/8 + 3/5 + 3/10. You must make a common denominator of 40 because that is the lowest number each denominator is divisible into. For 3/8 you get 15/40. [40 8 = 5, thus the numerator becomes 15 (3 x 5) and the numerator becomes 40 (8 x 5)]. For 3/5 you get 24/40. [40 5 = 8, thus the numerator becomes 24 (3 x 8) and the numerator becomes 40 (5 x 8)]. For 3/10 you get 15/40. [40 10 = 4, thus the numerator becomes 12 (3 x 4) and the numerator becomes 40 (10 x 4)]. The total is 15/ / /40 = 51/40. As a mixed number, it is 1 11/40. Subtraction of Fractions Once again, you must augment the fractions to make the denominators the same and then subtract the numerators. Here is an example: Subtract 26/8 12/16 1/32. The lowest common denominator is 32. For 26/8 you get 104/32 [32 8 = 4, thus the numerator becomes 104 (26 x 4) and the numerator becomes 32 (8 x 4)]. For 12/16 you get 24/32 [32 16 = 2, thus the numerator becomes 24 (12 x 2) and the numerator becomes 32 (16 x 2)]. For 1/32, it remains as 1/32 The total is 104/32 24/32 1/32 = 79/32. As a mixed number, it is 2 15/32 Multiply Fractions It is easier to multiply fractions because you do not need to find a common denominator. You simply multiply both the numerators and denominators straight across. For example: 2/3 x 4/5 = [2 x 4 (both numerators) = 8]/[3 x 5 (both denominators) = 15] = 8/15 Another way of wording this question is How much is two-thirds of four-fifths? or How much is two-thirds times four-fifths?

10 Dividing Fractions This is done with a twist to the multiplication of fractions. You must multiply the reciprocal of the second fraction. The reciprocal is found by turning the second fraction upside down and then multiplying it by the first fraction. For example: ¾ 5/8 becomes ¾ x 8/5. This is solved as [3 x 8 (both numerators) = 24]/[4 x 5 (both denominators) = 20) = 24/20 which can be reduced to 6/5 when both the 24 (the numerator) and the 20 (the denominator) are divided by 4. You must be careful to only use the reciprocal of the second fraction. Any number divided by itself is 1. For example: 2/3 2/3 = 1 or (2 x 3 = 6)/(3 x 2 = 6) = 6/6 = 1 Converting a Mixed Number to a Fraction 5 7/8 is a mixed number. To convert it to a fraction, you must multiply the whole number (5) by the denominator (8) and add it to the numerator (7) and your answer goes over the same denominator. Thus you get 5 x 8 = = 47/8. Adding Mixed Numbers You must add the two whole numbers and add the two fractions. For example: 4 ¾ + 2 3/8 = (4 + 2 = 6) + (3/4 + 3/8 = 6/8 + 3/8 = 9/8 = 1 1/8) so now you get /8 = 7 1/8. Subtracting Mixed Numbers What is 5 7/9 3 2/3? Subtract the whole numbers (5 3 = 2) and subtract the fractions (7/9 2/3 = 7/9 6/9 = 1/9) so now you have 2 1/9. But what if you had 5 5/9 3 2/3? When you try to subtract the fractions it is 5/9 6/9. This will not work because 6 is larger than 5. You must slice up the first whole number to become 4 9/9. Thus your have [4 3 (both numerators) = 1] and subtract the fractions that now read [9/9 + 5/9 = 14/9 6/9 = 8/9). Your final answer is now 1 8/9. Another way of subtracting mixed numbers is to change them to improper fractions and then subtract them. For example: What is 5 7/9 3 2/3? The improper fractions are 52/9 11/3 = 52/9 33/9 = 19/9 = 2 1/9 What is 5 5/9 3 2/3? The improper fractions are 50/9 11/3 = 50/9 33/9 = 17/9 = 1 8/9

11 Multiplying and Dividing Mixed Numbers The simplest way is to convert the mixed numbers to fractions and either multiply or divide. For example: 3 1/3 x 4 ¾ = 10/3 x 19/4 = 190/12 = 15 10/12 or 15 5/6 when the numerator (10) and the denominator (12) are divided by 2. Practice Questions: 1. 6/7 + 4/7 =? 2. 3/5 + 3/8 + 5/4 + 3/10 =? 3. 7/8 1/3 =? 4. ¾ x 4/5 =? 5. 3/5 ¾ =? 6. 2/3 2/3 =? /3 + 4 ¼ =? /8-7 5/8 =? /3 4 ¾ =? /8 x 5 4/5 =?

12 Chapter 7: Multiplying Different Signs When multiplying a negative number by a positive number (or a positive number by a negative number) the answer is negative. For example: 3 x 4 = 12 or 4 x 3 = 12 When multiplying a negative number by a negative number the answer is positive. For example: 3 x 4 = 12

13 Chapter 8: Decimals Fractions and decimals are similar but are written differently. For example: the fraction 1/10 is written 0.1. A decimal carries the decimal place-value system, which is based on the number 10, into the domain of fractions that are based on 10, namely 1/10. 1/100, 1/1,000, etc. It is always best to write a decimal with a 0 in front of the decimal. For example:.6 should be written 0.6. Moving the Decimal Point to the Right By moving the decimal point one number to the right, you are multiply the number by 10. By moving the decimal point two numbers to the right, you are multiply the number by 100. For example: becomes 2,631.2 ( x 10) becomes 26,312.0 ( x 100) Moving the Decimal Point to the Left By moving the decimal point one number to the left, you are multiplying the number by 1/10 or dividing the number by 10. By moving the decimal point two numbers to the left, you are multiply the number by 1/100 or dividing the number by 100. For example: becomes ( ) becomes ( ) Adding and Subtracting Decimals You should keep your columns straight by having the same amount of numbers under each other. For example: Add 2, becomes 2, ,

14 Subtract.007 from 2,500 becomes 2, , Multiplying Decimals For example: 5.75 x 8.7 Multiply as though they were whole numbers and then take care of the decimal place. First: 575 x 87 = 50,025 Second: 5.75 has two decimal places to the right and 8.7 has one decimal place to the right, so you add = 3. You then insert the decimal in your answer three places to the left to get Here is another example: Multiply.003 x 0.07 First: 3 x 7 =21 Second: There are 5 decimal places so the answer becomes Dividing Decimals For example: Get rid of the decimal in the divisor (0.5 becomes 5 by moving the decimal one place to the right). Next move the same number of decimals in the numerator to the right. You now have 50/5 = 10. Here is another example: becomes = Rounding off numbers following decimals If you want to round off to three decimal places (that is, only have three numbers to the right of the decimal point) the rule is that if the fourth number (the next number to the desired number to the right) is 5 or greater, the third number is increased by 1. For example: Round to three decimal places. It becomes because the number after 8 (the third number) is 8 which is greater than 4 or 5 or greater. Round to three decimal places becomes because the number after 8 is 4. You do not go to the fifth number.

15 Chapter 9: Percentages Percentages are the mathematical equivalent of fractions and decimals. Percent means per hundred. 42% means 42 per hundred. Decimals are converted to percentages by moving their decimal point two places to the right and percents can be converted to decimals by moving their decimal point two places to the left. For example: 0.32 = 32% and 45% = 0.45 Change Fractions to Percentages Change the fraction to a percentage by dividing the numerator by the denominator and then change the decimal to a percentage by moving the decimal point two places to the right. For example: 3/5 =.6 = 60% Change Percentages to Fractions Move the decimal two places to the left. Change the number to the right of the decimal into a fraction of 10 (or 100, 1,000 depending on the number of decimal places). For example: 235% = 2.35 = 235/100 Finding Percentage Changes A person earning \$250 a week got a \$50 raise. What percent was that? The formula is the change/ the original number, thus 50/250 = 1/5 = 20/100 = 20%. Percentage Increases If you double a number, did it increase 200% or 100%? (Let s say the number was 100 and was doubled to 200). Using the formula, the increase was 100/100 = 1 = 100%. Percentage Decreases The same formula is used. If a person used to work 40 hours a week and now only work 36 hours, what was the percentage change? It would be 4(the amount of change)/40 = 10%. A 100% decrease always gives an answer of 0.

16 Calculations Using Percentages A person is earning \$2,000 a month and must pay 16% of that in taxes. What is the amount paid in taxes? Change the percent used into a decimal and multiply. Thus you get \$2,000 x.16 = \$320 or \$160 for every \$1,000 earned. Practice Questions: 1. A person weighed 180 pounds and wanted to lose 40 pounds. What percent is that? (Round off to two decimal places) 2. A person earned \$400 a week and wanted a 15% raise. How much would the raise be?

17 Chapter 10: Basic Algebra Letters, called variables, are often used to represent numbers. For example: x + 5 = 12. This is solved by moving the actual number on the left to the right side of the = sign and changing the sign of the number. Thus: x + 5 = 12 becomes x = 12 5 = 7. Brackets are often used for multiplication and division. For example: 3 (x) = 30. This is solved by moving the actual number on the left to the right side of the = sign and changing the sign of the number. Thus 3 (x) = 30 becomes x = 30 3 = 10. Here is another example: 4 = 40/ x This is solved by moving the actual number on the right to the left side of the = sign and making that number the numerator in a fraction. Thus 4 = 40/x becomes 40/4 = x or 10 = x Practice Questions: 1. x = = x (x + 7) = = 125/x 5. x (16) = 192

18 Chapter 1: Addition , ,004 3,425 9,065 13, ,786 ANSWERS for All Chapters Chapter 2: Subtraction After the first floor there were 15 3 = 12 people left. After the second floor, there were 12 6 = 6 people left. Another way to calculate this is: 3 got off on the first floor + 6 got off on the second floor (3 + 6 = 9), leaving 15 9 = 6 people left.

19 Chapter 3: Multiplication Answers to the multiplication table: x x 678 = 218, x678 2,576 2,254 1, , ,781 x 542 = 3,675,302 Chapter 4: Dividing 6,781 x542 13,562 27,124 33,905 3,675, ,002 8 = 125 R2 or (2 8 =.25) 2. 4,004 4 = 1,001

20 Chapter 6: Fractions and Mixed Numbers 1. 6/7 + 4/7 = 10/7 = 1 3/7 2. 3/5 + 3/8 + 5/4 + 3/10 = 24/ / / /40 = 101/40 = 2 21/ /8 1/3 = 21/24 8/24 = 13/24 4. ¾ x 4/5 = 12/20 = 3/5 5. 3/5 ¾ = 3/5 x 4/3 = 12/15 = 4/5 6. 2/3 2/3 = /3 + 4 ¼ = (7 + 4 = 11) + (2/3 + ¼ = 8/12 + 3/12 = 11/12) = 11 11/ /8-7 5/8 = (7 7 = 0) (8/8 + 3/8 = 11/8-5/8 = 6/8 = ¾) /3 4 ¾ = 11/3 19/4 = 11/3 x 4/19 = 44/ /8 x 5 4/5 = 29/8 x 29/5 = 841/40 = 21 1/40 or Chapter 9: Percentages 1. 40/180 =.2222 = 22.22% x.15 = \$60 Chapter 10: Basic Algebra 1. x = 210 x = = = x = x = (x + 7) = 64 4x + 28 = 64 4x = x = 36 x = 36/4 = = 125/x 125/5 = x = x (16) = 192 x = 192/16 = 12

Maths Workshop for Parents 2. Fractions and Algebra

Maths Workshop for Parents 2 Fractions and Algebra What is a fraction? A fraction is a part of a whole. There are two numbers to every fraction: 2 7 Numerator Denominator 2 7 This is a proper (or common)

Paramedic Program Pre-Admission Mathematics Test Study Guide

Paramedic Program Pre-Admission Mathematics Test Study Guide 05/13 1 Table of Contents Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page

PREPARATION FOR MATH TESTING at CityLab Academy

PREPARATION FOR MATH TESTING at CityLab Academy compiled by Gloria Vachino, M.S. Refresh your math skills with a MATH REVIEW and find out if you are ready for the math entrance test by taking a PRE-TEST

MATH-0910 Review Concepts (Haugen)

Unit 1 Whole Numbers and Fractions MATH-0910 Review Concepts (Haugen) Exam 1 Sections 1.5, 1.6, 1.7, 1.8, 2.1, 2.2, 2.3, 2.4, and 2.5 Dividing Whole Numbers Equivalent ways of expressing division: a b,

MULTIPLICATION AND DIVISION OF REAL NUMBERS In this section we will complete the study of the four basic operations with real numbers.

1.4 Multiplication and (1-25) 25 In this section Multiplication of Real Numbers Division by Zero helpful hint The product of two numbers with like signs is positive, but the product of three numbers with

Fractions. If the top and bottom numbers of a fraction are the same then you have a whole one.

What do fractions mean? Fractions Academic Skills Advice Look at the bottom of the fraction first this tells you how many pieces the shape (or number) has been cut into. Then look at the top of the fraction

Chapter 1: Order of Operations, Fractions & Percents

HOSP 1107 (Business Math) Learning Centre Chapter 1: Order of Operations, Fractions & Percents ORDER OF OPERATIONS When finding the value of an expression, the operations must be carried out in a certain

HFCC Math Lab Arithmetic - 4. Addition, Subtraction, Multiplication and Division of Mixed Numbers

HFCC Math Lab Arithmetic - Addition, Subtraction, Multiplication and Division of Mixed Numbers Part I: Addition and Subtraction of Mixed Numbers There are two ways of adding and subtracting mixed numbers.

Decimals and other fractions

Chapter 2 Decimals and other fractions How to deal with the bits and pieces When drugs come from the manufacturer they are in doses to suit most adult patients. However, many of your patients will be very

CONTENTS Introduction...iv. Number Systems... 2. Algebraic Expressions.... Factorising...24 4. Solving Linear Equations...8. Solving Quadratic Equations...0 6. Simultaneous Equations.... Long Division

3 cups ¾ ½ ¼ 2 cups ¾ ½ ¼. 1 cup ¾ ½ ¼. 1 cup. 1 cup ¾ ½ ¼ ¾ ½ ¼. 1 cup. 1 cup ¾ ½ ¼ ¾ ½ ¼

cups cups cup Fractions are a form of division. When I ask what is / I am asking How big will each part be if I break into equal parts? The answer is. This a fraction. A fraction is part of a whole. The

FRACTIONS COMMON MISTAKES

FRACTIONS COMMON MISTAKES 0/0/009 Fractions Changing Fractions to Decimals How to Change Fractions to Decimals To change fractions to decimals, you need to divide the numerator (top number) by the denominator

DECIMAL COMPETENCY PACKET

DECIMAL COMPETENCY PACKET Developed by: Nancy Tufo Revised: Sharyn Sweeney 2004 Student Support Center North Shore Community College 2 In this booklet arithmetic operations involving decimal numbers are

Math Review. Numbers. Place Value. Rounding Whole Numbers. Place value thousands hundreds tens ones

Math Review Knowing basic math concepts and knowing when to apply them are essential skills. You should know how to add, subtract, multiply, divide, calculate percentages, and manipulate fractions. This

Solution Guide Chapter 14 Mixing Fractions, Decimals, and Percents Together

Solution Guide Chapter 4 Mixing Fractions, Decimals, and Percents Together Doing the Math from p. 80 2. 0.72 9 =? 0.08 To change it to decimal, we can tip it over and divide: 9 0.72 To make 0.72 into a

Fractions Packet. Contents

Fractions Packet Contents Intro to Fractions.. page Reducing Fractions.. page Ordering Fractions page Multiplication and Division of Fractions page Addition and Subtraction of Fractions.. page Answer Keys..

+ = has become. has become. Maths in School. Fraction Calculations in School. by Kate Robinson

+ has become 0 Maths in School has become 0 Fraction Calculations in School by Kate Robinson Fractions Calculations in School Contents Introduction p. Simplifying fractions (cancelling down) p. Adding

1.6 The Order of Operations

1.6 The Order of Operations Contents: Operations Grouping Symbols The Order of Operations Exponents and Negative Numbers Negative Square Roots Square Root of a Negative Number Order of Operations and Negative

3.3 Addition and Subtraction of Rational Numbers

3.3 Addition and Subtraction of Rational Numbers In this section we consider addition and subtraction of both fractions and decimals. We start with addition and subtraction of fractions with the same denominator.

Unit 1 Number Sense. In this unit, students will study repeating decimals, percents, fractions, decimals, and proportions.

Unit 1 Number Sense In this unit, students will study repeating decimals, percents, fractions, decimals, and proportions. BLM Three Types of Percent Problems (p L-34) is a summary BLM for the material

All the examples in this worksheet and all the answers to questions are available as answer sheets or videos.

BIRKBECK MATHS SUPPORT www.mathsupport.wordpress.com Numbers 3 In this section we will look at - improper fractions and mixed fractions - multiplying and dividing fractions - what decimals mean and exponents

47 Numerator Denominator

JH WEEKLIES ISSUE #22 2012-2013 Mathematics Fractions Mathematicians often have to deal with numbers that are not whole numbers (1, 2, 3 etc.). The preferred way to represent these partial numbers (rational

Numerator Denominator

Fractions A fraction is any part of a group, number or whole. Fractions are always written as Numerator Denominator A unitary fraction is one where the numerator is always 1 e.g 1 1 1 1 1...etc... 2 3

Calculator Worksheet--page 1

Calculator Worksheet--page 1 Name On this worksheet, I will be referencing keys that are on the TI30Xa. If you re using a different calculator, similar keys should be there; you just need to fi them! Positive/Negative

Addition Methods. Methods Jottings Expanded Compact Examples 8 + 7 = 15

Addition Methods Methods Jottings Expanded Compact Examples 8 + 7 = 15 48 + 36 = 84 or: Write the numbers in columns. Adding the tens first: 47 + 76 110 13 123 Adding the units first: 47 + 76 13 110 123

2.5 Zeros of a Polynomial Functions

.5 Zeros of a Polynomial Functions Section.5 Notes Page 1 The first rule we will talk about is Descartes Rule of Signs, which can be used to determine the possible times a graph crosses the x-axis and

Fractions to decimals

Worksheet.4 Fractions and Decimals Section Fractions to decimals The most common method of converting fractions to decimals is to use a calculator. A fraction represents a division so is another way of

Fraction Competency Packet

Fraction Competency Packet Developed by: Nancy Tufo Revised 00: Sharyn Sweeney Student Support Center North Shore Community College To use this booklet, review the glossary, study the examples, then work

3.1. RATIONAL EXPRESSIONS

3.1. RATIONAL EXPRESSIONS RATIONAL NUMBERS In previous courses you have learned how to operate (do addition, subtraction, multiplication, and division) on rational numbers (fractions). Rational numbers

Maths Refresher. Working with Fractions

Maths Refresher Working with Fractions Working with fractions Learning intentions. Become familiar with fractions Equivalent fractions Converting mixed numbers to improper fractions Converting improper

QM0113 BASIC MATHEMATICS I (ADDITION, SUBTRACTION, MULTIPLICATION, AND DIVISION)

SUBCOURSE QM0113 EDITION A BASIC MATHEMATICS I (ADDITION, SUBTRACTION, MULTIPLICATION, AND DIVISION) BASIC MATHEMATICS I (ADDITION, SUBTRACTION, MULTIPLICATION AND DIVISION) Subcourse Number QM 0113 EDITION

Numeracy Preparation Guide. for the. VETASSESS Test for Certificate IV in Nursing (Enrolled / Division 2 Nursing) course

Numeracy Preparation Guide for the VETASSESS Test for Certificate IV in Nursing (Enrolled / Division Nursing) course Introduction The Nursing course selection (or entrance) test used by various Registered

PERCENTS. Percent means per hundred. Writing a number as a percent is a way of comparing the number with 100. For example: 42% =

PERCENTS Percent means per hundred. Writing a number as a percent is a way of comparing the number with 100. For example: 42% = Percents are really fractions (or ratios) with a denominator of 100. Any

The gas can has a capacity of 4.17 gallons and weighs 3.4 pounds.

hundred million\$ ten------ million\$ million\$ 00,000,000 0,000,000,000,000 00,000 0,000,000 00 0 0 0 0 0 0 0 0 0 Session 26 Decimal Fractions Explain the meaning of the values stated in the following sentence.

SIMPLIFYING ALGEBRAIC FRACTIONS

Tallahassee Community College 5 SIMPLIFYING ALGEBRAIC FRACTIONS In arithmetic, you learned that a fraction is in simplest form if the Greatest Common Factor (GCF) of the numerator and the denominator is

Quick Reference ebook

This file is distributed FREE OF CHARGE by the publisher Quick Reference Handbooks and the author. Quick Reference ebook Click on Contents or Index in the left panel to locate a topic. The math facts listed

Multiplying Fractions

. Multiplying Fractions. OBJECTIVES 1. Multiply two fractions. Multiply two mixed numbers. Simplify before multiplying fractions 4. Estimate products by rounding Multiplication is the easiest of the four

north seattle community college

INTRODUCTION TO FRACTIONS If we divide a whole number into equal parts we get a fraction: For example, this circle is divided into quarters. Three quarters, or, of the circle is shaded. DEFINITIONS: The

Accuplacer Arithmetic Study Guide

Accuplacer Arithmetic Study Guide Section One: Terms Numerator: The number on top of a fraction which tells how many parts you have. Denominator: The number on the bottom of a fraction which tells how

Integers, I, is a set of numbers that include positive and negative numbers and zero.

Grade 9 Math Unit 3: Rational Numbers Section 3.1: What is a Rational Number? Integers, I, is a set of numbers that include positive and negative numbers and zero. Imagine a number line These numbers are

CBA Fractions Student Sheet 1

Student Sheet 1 1. If 3 people share 12 cookies equally, how many cookies does each person get? 2. Four people want to share 5 cakes equally. Show how much each person gets. Student Sheet 2 1. The candy

Preliminary Mathematics

Preliminary Mathematics The purpose of this document is to provide you with a refresher over some topics that will be essential for what we do in this class. We will begin with fractions, decimals, and

MATHS ACTIVITIES FOR REGISTRATION TIME

MATHS ACTIVITIES FOR REGISTRATION TIME At the beginning of the year, pair children as partners. You could match different ability children for support. Target Number Write a target number on the board.

Contents. Subtraction (Taking Away)... 6. Multiplication... 7 by a single digit. by a two digit number by 10, 100 or 1000

This booklet outlines the methods we teach pupils for place value, times tables, addition, subtraction, multiplication, division, fractions, decimals, percentages, negative numbers and basic algebra Any

Solutions of Linear Equations in One Variable

2. Solutions of Linear Equations in One Variable 2. OBJECTIVES. Identify a linear equation 2. Combine like terms to solve an equation We begin this chapter by considering one of the most important tools

Arithmetic Review ORDER OF OPERATIONS WITH WHOLE NUMBERS

Arithmetic Review The arithmetic portion of the Accuplacer Placement test consists of seventeen multiple choice questions. These questions will measure skills in computation of whole numbers, fractions,

How do you compare numbers? On a number line, larger numbers are to the right and smaller numbers are to the left.

The verbal answers to all of the following questions should be memorized before completion of pre-algebra. Answers that are not memorized will hinder your ability to succeed in algebra 1. Number Basics

UNDERSTANDING ALGEBRA JAMES BRENNAN Copyright 00, All Rights Reserved CONTENTS CHAPTER 1: THE NUMBERS OF ARITHMETIC 1 THE REAL NUMBER SYSTEM 1 ADDITION AND SUBTRACTION OF REAL NUMBERS 8 MULTIPLICATION

1.2 Linear Equations and Rational Equations

Linear Equations and Rational Equations Section Notes Page In this section, you will learn how to solve various linear and rational equations A linear equation will have an variable raised to a power of

Order of Operations More Essential Practice

Order of Operations More Essential Practice We will be simplifying expressions using the order of operations in this section. Automatic Skill: Order of operations needs to become an automatic skill. Failure

JobTestPrep's Numeracy Review Decimals & Percentages

JobTestPrep's Numeracy Review Decimals & Percentages 1 Table of contents What is decimal? 3 Converting fractions to decimals 4 Converting decimals to fractions 6 Percentages 6 Adding and subtracting decimals

Arithmetic Computation Test (ACT) Preparation Guide

Arithmetic Computation Test (ACT) Preparation Guide CONFIDENTIAL A.C.T. PREPARATION GUIDE It is important that employees demonstrate that they have basic problem solving skills. The purpose of the Arithmetic

How we teach calculations in Maths A Parent s Guide

How we teach calculations in Maths A Parent s Guide Belmont Maths Department 2011 1 Contents Introduction...Page 3 Maths at Belmont...Page 4 Addition...Page 5 Subtraction...Page 7 Multiplication...Page

Revision Notes Adult Numeracy Level 2

Revision Notes Adult Numeracy Level 2 Place Value The use of place value from earlier levels applies but is extended to all sizes of numbers. The values of columns are: Millions Hundred thousands Ten thousands

Exponents. Exponents tell us how many times to multiply a base number by itself.

Exponents Exponents tell us how many times to multiply a base number by itself. Exponential form: 5 4 exponent base number Expanded form: 5 5 5 5 25 5 5 125 5 625 To use a calculator: put in the base number,

Pre-Algebra Lecture 6

Pre-Algebra Lecture 6 Today we will discuss Decimals and Percentages. Outline: 1. Decimals 2. Ordering Decimals 3. Rounding Decimals 4. Adding and subtracting Decimals 5. Multiplying and Dividing Decimals

GCSE MATHEMATICS. 43602H Unit 2: Number and Algebra (Higher) Report on the Examination. Specification 4360 November 2014. Version: 1.

GCSE MATHEMATICS 43602H Unit 2: Number and Algebra (Higher) Report on the Examination Specification 4360 November 2014 Version: 1.0 Further copies of this Report are available from aqa.org.uk Copyright

Session 7 Fractions and Decimals

Key Terms in This Session Session 7 Fractions and Decimals Previously Introduced prime number rational numbers New in This Session period repeating decimal terminating decimal Introduction In this session,

FRACTIONS MODULE Part I

FRACTIONS MODULE Part I I. Basics of Fractions II. Rewriting Fractions in the Lowest Terms III. Change an Improper Fraction into a Mixed Number IV. Change a Mixed Number into an Improper Fraction BMR.Fractions

Unit 2 Number and Operations Fractions: Multiplying and Dividing Fractions

Unit Number and Operations Fractions: Multiplying and Dividing Fractions Introduction In this unit, students will divide whole numbers and interpret the answer as a fraction instead of with a remainder.

Math Workshop October 2010 Fractions and Repeating Decimals

Math Workshop October 2010 Fractions and Repeating Decimals This evening we will investigate the patterns that arise when converting fractions to decimals. As an example of what we will be looking at,

Working with whole numbers

1 CHAPTER 1 Working with whole numbers In this chapter you will revise earlier work on: addition and subtraction without a calculator multiplication and division without a calculator using positive and

Using a Scientific Calculator

1 Using a Scientific Calculator In this course, we will be using a scientific calculator to do all of our computations. So, in this section, we want to get use to some of the features of a scientific calculator.

FRACTIONS. The student will be able to: Essential Fraction Vocabulary

FRACTIONS The student will be able to:. Perform basic operations with common fractions: addition, subtraction, multiplication, and division. Common fractions, such as /, /, and /, are used on the GED Test

Introduction to Fractions, Equivalent and Simplifying (1-2 days)

Introduction to Fractions, Equivalent and Simplifying (1-2 days) 1. Fraction 2. Numerator 3. Denominator 4. Equivalent 5. Simplest form Real World Examples: 1. Fractions in general, why and where we use

Basic Use of the TI-84 Plus

Basic Use of the TI-84 Plus Topics: Key Board Sections Key Functions Screen Contrast Numerical Calculations Order of Operations Built-In Templates MATH menu Scientific Notation The key VS the (-) Key Navigation

POLYNOMIAL FUNCTIONS

POLYNOMIAL FUNCTIONS Polynomial Division.. 314 The Rational Zero Test.....317 Descarte s Rule of Signs... 319 The Remainder Theorem.....31 Finding all Zeros of a Polynomial Function.......33 Writing a

Math Refresher. Book #2. Workers Opportunities Resources Knowledge

Math Refresher Book #2 Workers Opportunities Resources Knowledge Contents Introduction...1 Basic Math Concepts...2 1. Fractions...2 2. Decimals...11 3. Percentages...15 4. Ratios...17 Sample Questions...18

Math Review. for the Quantitative Reasoning Measure of the GRE revised General Test

Math Review for the Quantitative Reasoning Measure of the GRE revised General Test www.ets.org Overview This Math Review will familiarize you with the mathematical skills and concepts that are important

Sect 3.2 - Least Common Multiple

Let's start with an example: Sect 3.2 - Least Common Multiple Ex. 1 Suppose a family has two different pies. If they have 2 3 of one type of pie and 3 of another pie, is it possible to combine the pies

Using Proportions to Solve Percent Problems I

RP7-1 Using Proportions to Solve Percent Problems I Pages 46 48 Standards: 7.RP.A. Goals: Students will write equivalent statements for proportions by keeping track of the part and the whole, and by solving

Charlesworth School Year Group Maths Targets

Charlesworth School Year Group Maths Targets Year One Maths Target Sheet Key Statement KS1 Maths Targets (Expected) These skills must be secure to move beyond expected. I can compare, describe and solve

THE BINARY NUMBER SYSTEM

THE BINARY NUMBER SYSTEM Dr. Robert P. Webber, Longwood University Our civilization uses the base 10 or decimal place value system. Each digit in a number represents a power of 10. For example, 365.42

Multiplying and Dividing Signed Numbers. Finding the Product of Two Signed Numbers. (a) (3)( 4) ( 4) ( 4) ( 4) 12 (b) (4)( 5) ( 5) ( 5) ( 5) ( 5) 20

SECTION.4 Multiplying and Dividing Signed Numbers.4 OBJECTIVES 1. Multiply signed numbers 2. Use the commutative property of multiplication 3. Use the associative property of multiplication 4. Divide signed

Numeracy Targets. I can count at least 20 objects

Targets 1c I can read numbers up to 10 I can count up to 10 objects I can say the number names in order up to 20 I can write at least 4 numbers up to 10. When someone gives me a small number of objects

Unit 7 The Number System: Multiplying and Dividing Integers

Unit 7 The Number System: Multiplying and Dividing Integers Introduction In this unit, students will multiply and divide integers, and multiply positive and negative fractions by integers. Students will

Indices and Surds. The Laws on Indices. 1. Multiplication: Mgr. ubomíra Tomková

Indices and Surds The term indices refers to the power to which a number is raised. Thus x is a number with an index of. People prefer the phrase "x to the power of ". Term surds is not often used, instead

Sunny Hills Math Club Decimal Numbers Lesson 4

Are you tired of finding common denominators to add fractions? Are you tired of converting mixed fractions into improper fractions, just to multiply and convert them back? Are you tired of reducing fractions

Fourth Grade Math Standards and "I Can Statements"

Fourth Grade Math Standards and "I Can Statements" Standard - CC.4.OA.1 Interpret a multiplication equation as a comparison, e.g., interpret 35 = 5 x 7 as a statement that 35 is 5 times as many as 7 and

Math 0980 Chapter Objectives. Chapter 1: Introduction to Algebra: The Integers.

Math 0980 Chapter Objectives Chapter 1: Introduction to Algebra: The Integers. 1. Identify the place value of a digit. 2. Write a number in words or digits. 3. Write positive and negative numbers used

YOU MUST BE ABLE TO DO THE FOLLOWING PROBLEMS WITHOUT A CALCULATOR!

DETAILED SOLUTIONS AND CONCEPTS - DECIMALS AND WHOLE NUMBERS Prepared by Ingrid Stewart, Ph.D., College of Southern Nevada Please Send Questions and Comments to ingrid.stewart@csn.edu. Thank you! YOU MUST

A Short Guide to Significant Figures

A Short Guide to Significant Figures Quick Reference Section Here are the basic rules for significant figures - read the full text of this guide to gain a complete understanding of what these rules really

TM parent ROADMAP MATHEMATICS SUPPORTING YOUR CHILD IN GRADE THREE 3 America s schools are working to provide higher quality instruction than ever before. The way we taught students in the past simply

WSMA Decimal Numbers Lesson 4

Thousands Hundreds Tens Ones Decimal Tenths Hundredths Thousandths WSMA Decimal Numbers Lesson 4 Are you tired of finding common denominators to add fractions? Are you tired of converting mixed fractions

Multiplying and Dividing Fractions

Multiplying and Dividing Fractions 1 Overview Fractions and Mixed Numbers Factors and Prime Factorization Simplest Form of a Fraction Multiplying Fractions and Mixed Numbers Dividing Fractions and Mixed

REVIEW SHEETS BASIC MATHEMATICS MATH 010

REVIEW SHEETS BASIC MATHEMATICS MATH 010 A Summary of Concepts Needed to be Successful in Mathematics The following sheets list the key concepts that are taught in the specified math course. The sheets

Decimal Notations for Fractions Number and Operations Fractions /4.NF

Decimal Notations for Fractions Number and Operations Fractions /4.NF Domain: Cluster: Standard: 4.NF Number and Operations Fractions Understand decimal notation for fractions, and compare decimal fractions.

23. RATIONAL EXPONENTS

23. RATIONAL EXPONENTS renaming radicals rational numbers writing radicals with rational exponents When serious work needs to be done with radicals, they are usually changed to a name that uses exponents,

COWLEY COUNTY COMMUNITY COLLEGE REVIEW GUIDE Compass Algebra Level 2

COWLEY COUNTY COMMUNITY COLLEGE REVIEW GUIDE Compass Algebra Level This study guide is for students trying to test into College Algebra. There are three levels of math study guides. 1. If x and y 1, what

Welcome to Harcourt Mega Math: The Number Games

Welcome to Harcourt Mega Math: The Number Games Harcourt Mega Math In The Number Games, students take on a math challenge in a lively insect stadium. Introduced by our host Penny and a number of sporting

Chapter 4 -- Decimals

Chapter 4 -- Decimals \$34.99 decimal notation ex. The cost of an object. ex. The balance of your bank account ex The amount owed ex. The tax on a purchase. Just like Whole Numbers Place Value - 1.23456789

Basic numerical skills: FRACTIONS, DECIMALS, PROPORTIONS, RATIOS AND PERCENTAGES

Basic numerical skills: FRACTIONS, DECIMALS, PROPORTIONS, RATIOS AND PERCENTAGES. Introduction (simple) This helpsheet is concerned with the ways that we express quantities that are not whole numbers,

Level 1 - Maths Targets TARGETS. With support, I can show my work using objects or pictures 12. I can order numbers to 10 3

Ma Data Hling: Interpreting Processing representing Ma Shape, space measures: position shape Written Mental method s Operations relationship s between them Fractio ns Number s the Ma1 Using Str Levels

Graphing Calculator Workshops

Graphing Calculator Workshops For the TI-83/84 Classic Operating System & For the TI-84 New Operating System (MathPrint) LEARNING CENTER Overview Workshop I Learn the general layout of the calculator Graphing

Accentuate the Negative: Homework Examples from ACE

Accentuate the Negative: Homework Examples from ACE Investigation 1: Extending the Number System, ACE #6, 7, 12-15, 47, 49-52 Investigation 2: Adding and Subtracting Rational Numbers, ACE 18-22, 38(a),

Arithmetic 1 Progress Ladder Maths Makes Sense Foundation End-of-year objectives page 2 Maths Makes Sense 1 2 End-of-block objectives page 3 Maths Makes Sense 3 4 End-of-block objectives page 4 Maths Makes