MATH 20 EXTRA PRACTICE/ Name

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1 MATH 20 EXTRA PRACTICE/ Name Identify the digit with the given place value. 1) thousandths 2) ten-thousandths 3) tenths Write the decimal number that has the specified place values. 4) 7 tens, 4 tenths, 9 hundreds, 8 ones, 2 hundredths 5) 6 tenths, 5 ten-thousandths, 8 hundredths, 6 hundreds 6) 6 tens, 3 ten-thousands, 1 hundredths, 5 ones, 6 ten-thousandths Write the decimal as a fraction or mixed number in lowest terms. 7) ) ) 0.58 Write the decimal in words. 10) ) ) Write the decimal in numbers. 13) Six and five hundred sixteen ten-thousandths 14) Ten and six tenths 15) Eight and seventeen hundredths 1

2 Solve the problem. 16) An electrician has to choose different types of wire for different applications. The size of the diameter of the wire is inversely related to the gauge of the wire. The chart below shows some different gauges of wire and their approximate diameters. Use the chart to answer the question. What is the gauge of the wire with a diameter of inch? 17) Suppose your job is to take phone orders for computer parts. Use the table below to answer the following questions. Write the correct part number that matches what you hear the customer say on the phone. Part Number A B C D E F G H I Size in centimeters "Do you have that part in 1 and 1 tenths centimeters?" 2

3 18) Suppose your job is to take phone orders for machine parts. Use the table below to answer the following questions. Write the correct part number that matches what you hear the customer say on the phone. Part Number A B C D E F G H I Size in centimeters "Please send the 7-hundredths centimeter part." Round the number to the place indicated. 19) Round to the nearest hundredth: ) Round to the nearest one: ) Round to the nearest one: ) Round to the nearest tenth: You are on a shopping trip. The store will round the amount you pay for each item to the nearest cent. Find the amount you will pay. 23) Printer ribbons are 6 ribbons for $29.09, so one ribbon is $ You pay: 24) Compact disks are 3 for $43.31, so one CD is $ You pay: 25) Laundry detergent is 2 bottles for $3.13, so one bottle is $ You pay: 26) 35 mm film is 4 rolls for $34.15, so one roll is $ You pay: In order to prepare her budget, Sue gathers receipts for all major expenses she has had over the last month. Round the figure to the nearest dollar. 27) Tuition payment, $ ) Donations to charity, $ ) Books, $

4 30) Car payment, $ Round the money amount to the specified place. 31) $ to the nearest dollar 32) $2.186 to the nearest cent. 33) $ to the nearest cent 34) $64.21 to the nearest dollar Round to the indicated place. 35) A student has a test average of Round this result to the ones place. 36) The Dow Jones Industrial Average increased by 2.364% last week. Express this change rounded to the nearest tenth. 37) The Great Pyramid of Khufu in Egypt is meters tall. Round this measurement to the nearest tenth of a meter. Find the sum. 38) ) ) ) Find the difference. 42) ) ) Subtract from ) Use front-end rounding to round each number. Then, add or subtract the rounded numbers to get an estimated answer. Finally, find the exact answer. 46) estimate exact

5 47) estimate exact ) estimate exact Use your estimation skills to pick the most reasonable answer. Do not solve the problem. 49) A) 148 B) 1.48 C) ) A) B) 2.66 C) First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer. 51) John is taking a road to Calistoga. He has already driven kilometers. If the entire distance to Calistoga is 148 kilometers, how much further must John drive? 52) Tran's subtotal at Scramble's Electronics is $ The sales tax on these items is $ What was Tran's total bill? 53) Ray's gross pay is $ per week. $54.68 is withheld for federal income tax, $25.10 for FICA tax, and $11.32 for other deductions. Find his net pay. The table shows Jose's expenses for one month. Use the table to answer the question. 54) How much did Jose spend for food, car repairs, and utilities? Monthly Expenses Rent $448 Food $155 Car repairs $ Utilities $69.90 Phone (long distance) $66.18 Phone (local) $25.79 Drumming lessons $99 Entertainment $

6 55) What were Jose's total expenses for the month? Monthly Expenses Rent $441 Food $197 Car repairs, gas $ Utilities $52.48 Phone (long distance) $70.13 Phone (local) $29.34 Drumming lessons $115 Entertainment $65.55 Find the perimeter of (distance around) the given figure by adding the lengths of the sides. 56) 2 in. 1.4 in in in in. 1.6 in in. 57) 5.5 cm 2.5 cm 7 cm 2.29 cm 4.59 cm 6

7 Find the missing measurement in the figure. 58) a = 0.84 b = 0.2 cm c = 2 cm 59) a = 1.58 in. b = 1.58 in. c = 5.59 in. 7

8 60) a = 1.1 meters b = 1.1 meters c = 3.9 meters 8

9 Answer Key Testname: M20_ ) 5 2) 5 3) 1 4) ) ) 30, ) 125 8) ) ) Eight thousand five hundred thirty-one ten-thousandths 11) Nine and eight tenths 12) Seven and two hundred ninety-four hundred-thousandths 13) ) ) ) 14 gauge 17) D 18) B 19) ) ) 83 22) ) $ ) $ ) $ ) $ ) $ ) $289 29) $238 30) $313 31) $ ) $ ) $1 34) $64 35) 82 36) 2.4% 37) m 38) ) ) ) ) ) ) ) ) Estimate: 16; exact:

10 Answer Key Testname: M20_ ) Estimate: 59; exact: ) Estimate: 15,000; exact: 15, ) B 50) C 51) Estimate: 30 kilometers; exact: kilometers 52) Estimate: $320; exact: $ ) Estimate: $210; exact: $ ) ) ) in. 57) cm 58) z = 0.96 cm 59) z = 2.43 in. 60) z = 1.7 meter(s) 10

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