Changing Fractions to Decimals on a Calculator


 Ursula Carpenter
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1 Changing Fractions to Decimals on a Calculator You can change fractions to decimals on a calculator. Do you remember how to change a fraction to a decimal? Divide the numerator by the denominator. For, press = The calculator shows as 0.. The fraction has an exact decimal equivalent, 0.. For B, press = Depending on your calculator, it may show or The fraction B has no exact decimal equivalent. Your calculator may show the first part of the repeating decimal that is equal to B, or it may round the last digit on the display. Not all calculators show the result the same way. Look at the first example. Use it as a pattern to fill all the blanks in the following exercises. Use your calculator to find the answers.. For, press =. The calculator shows as For, press. The calculator shows as.. For, press. The calculator shows as.. For, press. The calculator shows as.. For, press. The calculator shows as. 6. For, press. The calculator shows as.. For, press. The calculator shows as.. For, press. The calculator shows as.. For, press. The calculator shows as. 0
2 Lesson Angles of a Quadrilateral The sum of the angle measurements of a quadrilateral is always 60. This is easy to remember for squares and rectangles, because angles 0 = 60. But it is also true of these quadrilaterals: Add the angle measurements of EFGH and IJKL. E F 00 0 I J H G L K 0. a. Sum: b. Sum: We R e m e m b e r Find the sales tax and total bill for each amount.. purchase $.00 a. 6% sales tax $ b. total bill $. purchase $6.0 a. % sales tax $ b. total bill $ Convert the metric units. kilo hecto deca deci centi milli. a. 60 mg = g b. mm = cm c. 0 g = kg
3 Lesson M a s t e r y D r i l l. kilometer = meters. The fraction we use for π is. 6. a. pint = cups b. quart = pints. An obtuse angle measures between and.. The four angles formed by a pair of intersecting lines measure a total of.. The four angles of a quadrilateral measure a total of. Find each number. 0. a. 60% of 0 = b. 0% of 0 =. Sara's school is giving a Thanksgiving program at the Oak Lane Senior Citizen s Home. The students, teachers, and parents will travel to the home in vans. Each van has seatbelts for people. How many vans will be needed?. The ancient Romans built about 0,000 miles of paved roads to connect every part of the Empire to the city of Rome. The United States has about,000 miles of interstate highways connecting most of the nation's largest cities to each other. What is the difference in miles between ancient Roman paved roads and modern United States interstate highways? 6
4 Lesson Divide to show each fraction as a decimal to the nearest hundredth. Then write the percent.. a. = b. = Divide. Write remainders with R.. a. ) 6, b. 6 ), c. 0 ),0 Use the circle graph on page to answer the questions.. How many dollars did Ashley spend on Christmas cards and books? 6. What percent of the money did Ashley spend on Christmas cards and books?. Which purchase cost twice as much as Ashley s church offering? Answer these questions.. If % of the population are farmers, what percent are not farmers?. If we take off % of the price, what percent is left to pay? Substitute for s. Simplify the expressions. 0. a. + s b. s + (s) 6
5 Lesson +  x S k i l l B u i l d e r s a. 0 b..0 6 c. Round to the nearest hundredth. 0 )., 6. a., b. = c. = Use your calculator to change the fractions to decimals.. The calculator shows 6 as.. The calculator shows as. 6 Electronic navigation is based on radio signals. The satellites you see blinking in the night sky are controlled in this way. Follow the directions.. Write the sum of the angle measurements of ABCD. A 0 0 B 6. Classify quadrilateral ABCD as a trapezoid, parallelogram, rhombus, rectangle, or square.. Give a reason for your answer in number 6. D C
6 C o n v e r t i n g C o m m o n M e t r i c U n i t s o f C a p a c i t y The liter is the basic unit of capacity in the metric system. The metric units of capacity that we use most commonly are the liter and the milliliter. Study the following chart. The units in the shaded rows are those you will work with in Math 600. UNIT RELATION TO GRAM kiloliter (kl),000 liters hectoliter (hl) 00 liters decaliter (dkl) 0 liters liter (L) liter deciliter (dl) 0. liter (/ liter) centiliter (cl) 0.0 liter liter),000 milliliter (ml) 0.00 liter ( liter) When we change between units in the metric system, we are actually multiplying or dividing by multiples of 0. When changing from larger to smaller units, multiply by moving the decimal point to the right. L = ml The chart shows that we move the decimal point three places to the right. L =,000 ml Remember L =,000 ml ml = 0.00 L When changing from smaller to larger units, divide by moving the decimal point to the left. 0 ml = L The chart shows that we move the decimal point three places to the left. 0 ml = 0. L kilo hecto deca deci centi milli
7 Lesson Convert the metric units. Use the metric chart on page if you need it.. a. 6. L = ml b., ml = L c L = ml. a. 6 ml = L b., ml = L c. 0.6 L = ml We R e m e m b e r Use your calculator to change the fraction to a decimal.. The calculator shows as. Follow the directions.. Write the sum of the angle measurements of EFGH.. Classify quadrilateral EFGH as a trapezoid, parallelogram, rhombus, rectangle, or square. E 0 F 6. Give a reason for your answer in number. H 0 G. Sara wants to triple a recipe for brownies. The recipe calls for cups of flour. There are exactly cups of flour left in the canister. Will it be enough?. There are dozen eggs in the refrigerator. The recipe for one angel food cake calls for eggs. Can Sara make three angel food cakes? 0
8 Lesson M a s t e r y D r i l l. a. cubic centimeter = milliliter b. quart = cups 0. a. millennium = years b. gallon = quarts. a. century = years b. decade = years. a. Deca means. b. Deci means. c. Milli means Follow the directions.. Classify triangle MNO as equilateral, isosceles, or scalene. M. Give a reason for your answer in number. N O +  x Write the remainder with R. S k i l l B u i l d e r s Write the repeating decimal with a bar. The largest country in the world is Russia, which covers almost million square miles, or million square kilometers.. a. 6 ), b. 0 ) 6 c. =, 6. a. b. 6, 6 c. +
9 Lesson?... M e n t a l M a t h =. a. of is b. of 0 is c. of is d. of is 6 Write the formula and find the circumference. Use. for pi. meters Change each percent to a fraction showing hundredths. Then reduce to simplest form. 0. a. % = = b. % = = Find the sales tax and total bill for each amount.. purchase $6.0 a. % sales tax $ b. total bill $. purchase $.00 a. % sales tax $ b. total bill $ Use factor trees to find the prime factors.. a. = b. = c. = Convert the metric units. kilo hecto deca deci centi milli. a.. L = ml b., m = km c. cm = m
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