Chapter 13: Chapter review
39 questions · with revealable worked answers
Calculate 4.7 + 0.2.
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Combine 47 and 2 tenths to get 49 tenths, or 4.9.
Calculate 5.8 + 4.7.
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The tenths combine to 15 tenths, which makes one whole and 5 tenths. Add whole units to get 10.5.
Calculate 5.3 − 1.9.
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Rename 5.3 as 4 wholes and 13 tenths. Subtract 1 whole and 9 tenths; result 3.4.
Calculate 1.39 + 2.03.
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Add 139+203 exact hundredths = 342 hundredths = 3.42.
Calculate 1.00 − 0.51.
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Rename 1.00 as 100 hundredths; subtract 51 hundredths to get 49 hundredths.
Calculate 7.44 − 2.11.
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744 hundredths minus 211 hundredths = 533 hundredths = 5.33.
An item costs $2.60 and another costs $2.79. What is their exact combined price?
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Add cents exactly: 260+279=539 cents = $5.39.
Calculate 4.1 + 0.3.
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Combine 41 and 3 tenths to get 44 tenths, or 4.4.
Calculate 1.9 + 1.7.
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The tenths combine to 16 tenths, which makes one whole and 6 tenths. Add whole units to get 3.6.
Calculate 7.3 − 1.8.
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Rename 7.3 as 6 wholes and 13 tenths. Subtract 1 whole and 8 tenths; result 5.5.
Calculate 5.45 + 3.94.
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Add 545+394 exact hundredths = 939 hundredths = 9.39.
Calculate 1.00 − 0.91.
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Rename 1.00 as 100 hundredths; subtract 91 hundredths to get 9 hundredths.
Calculate 3.84 − 2.68.
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384 hundredths minus 268 hundredths = 116 hundredths = 1.16.
An item costs $4.83 and another costs $2.81. What is their exact combined price?
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Add cents exactly: 483+281=764 cents = $7.64.
Calculate 3.7 + 0.3.
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Combine 37 and 3 tenths to get 40 tenths, or 4.0.
Calculate 3.7 + 0.9.
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The tenths combine to 16 tenths, which makes one whole and 6 tenths. Add whole units to get 4.6.
Calculate 3.2 − 1.6.
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Rename 3.2 as 2 wholes and 12 tenths. Subtract 1 whole and 6 tenths; result 1.6.
Calculate 1.27 + 1.97.
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Add 127+197 exact hundredths = 324 hundredths = 3.24.
Calculate 1.00 − 0.34.
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Rename 1.00 as 100 hundredths; subtract 34 hundredths to get 66 hundredths.
Calculate 6.08 − 1.50.
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608 hundredths minus 150 hundredths = 458 hundredths = 4.58.
An item costs $5.01 and another costs $2.80. What is their exact combined price?
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Add cents exactly: 501+280=781 cents = $7.81.
Calculate 3.7 + 1.2.
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Combine 37 and 12 tenths to get 49 tenths, or 4.9.
Calculate 5.9 + 2.6.
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The tenths combine to 15 tenths, which makes one whole and 5 tenths. Add whole units to get 8.5.
Calculate 2.2 − 1.6.
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Rename 2.2 as 1 wholes and 12 tenths. Subtract 1 whole and 6 tenths; result 0.6.
Calculate 4.72 + 3.15.
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Add 472+315 exact hundredths = 787 hundredths = 7.87.
Calculate 1.00 − 0.49.
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Rename 1.00 as 100 hundredths; subtract 49 hundredths to get 51 hundredths.
Calculate 5.67 − 2.59.
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567 hundredths minus 259 hundredths = 308 hundredths = 3.08.
An item costs $2.89 and another costs $1.83. What is their exact combined price?
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Add cents exactly: 289+183=472 cents = $4.72.
Calculate 3.9 + 1.0.
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Combine 39 and 10 tenths to get 49 tenths, or 4.9.
Calculate 1.6 + 1.9.
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The tenths combine to 15 tenths, which makes one whole and 5 tenths. Add whole units to get 3.5.
Calculate 3.2 − 1.5.
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Rename 3.2 as 2 wholes and 12 tenths. Subtract 1 whole and 5 tenths; result 1.7.
Calculate 6.80 + 3.48.
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Add 680+348 exact hundredths = 1028 hundredths = 10.28.
Calculate 7.0 + 0.4. Explain how place value or a model can check your result.
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Combine 70 and 4 tenths to get 74 tenths, or 7.4. A correct explanation should name the relevant fractional place values and verify the answer.
Calculate 1.8 + 0.9. Explain how place value or a model can check your result.
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The tenths combine to 17 tenths, which makes one whole and 7 tenths. Add whole units to get 2.7. A correct explanation should name the relevant fractional place values and verify the answer.
Calculate 7.3 − 1.7. Explain how place value or a model can check your result.
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Rename 7.3 as 6 wholes and 13 tenths. Subtract 1 whole and 7 tenths; result 5.6. A correct explanation should name the relevant fractional place values and verify the answer.
Calculate 6.48 + 2.20. Explain how place value or a model can check your result.
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Add 648+220 exact hundredths = 868 hundredths = 8.68. A correct explanation should name the relevant fractional place values and verify the answer.
Calculate 0.10 − 0.05. Explain how place value or a model can check your result.
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Rename 0.10 as 10 hundredths; subtract 5 hundredths to get 5 hundredths. A correct explanation should name the relevant fractional place values and verify the answer.
Calculate 7.40 − 2.21. Explain how place value or a model can check your result.
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740 hundredths minus 221 hundredths = 519 hundredths = 5.19. A correct explanation should name the relevant fractional place values and verify the answer.
An item costs $6.53 and another costs $2.93. What is their exact combined price? Explain how place value or a model can check your result.
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Add cents exactly: 653+293=946 cents = $9.46. A correct explanation should name the relevant fractional place values and verify the answer.