Chapter 13 — Practice 1
18 original mixed questions
Practice earlier ideas together. Check answers only after you have completed an attempt.
Calculate 1.9 + 1.0.
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Combine 19 and 10 tenths to get 29 tenths, or 2.9.
Calculate 2.8 + 4.7.
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The tenths combine to 15 tenths, which makes one whole and 5 tenths. Add whole units to get 7.5.
Calculate 3.1 − 1.7.
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Rename 3.1 as 2 wholes and 11 tenths. Subtract 1 whole and 7 tenths; result 1.4.
Calculate 3.11 + 3.24.
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Add 311+324 exact hundredths = 635 hundredths = 6.35.
Calculate 1.00 − 0.37.
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Rename 1.00 as 100 hundredths; subtract 37 hundredths to get 63 hundredths.
Calculate 5.09 − 1.69.
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509 hundredths minus 169 hundredths = 340 hundredths = 3.40.
An item costs $4.02 and another costs $3.10. What is their exact combined price?
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Add cents exactly: 402+310=712 cents = $7.12.
Calculate 2.8 + 0.8.
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Combine 28 and 8 tenths to get 36 tenths, or 3.6.
Calculate 4.8 + 1.9.
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The tenths combine to 17 tenths, which makes one whole and 7 tenths. Add whole units to get 6.7.
Calculate 5.3 − 1.8.
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Rename 5.3 as 4 wholes and 13 tenths. Subtract 1 whole and 8 tenths; result 3.5.
Calculate 4.86 + 3.36.
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Add 486+336 exact hundredths = 822 hundredths = 8.22.
Calculate 1.00 − 0.18.
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Rename 1.00 as 100 hundredths; subtract 18 hundredths to get 82 hundredths.
Calculate 5.16 − 1.33.
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516 hundredths minus 133 hundredths = 383 hundredths = 3.83.
An item costs $1.80 and another costs $3.32. What is their exact combined price?
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Add cents exactly: 180+332=512 cents = $5.12.
Calculate 4.3 + 0.6.
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Combine 43 and 6 tenths to get 49 tenths, or 4.9.
Calculate 5.7 + 1.5.
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The tenths combine to 12 tenths, which makes one whole and 2 tenths. Add whole units to get 7.2.
Calculate 5.3 − 1.6.
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Rename 5.3 as 4 wholes and 13 tenths. Subtract 1 whole and 6 tenths; result 3.7.
Calculate 3.31 + 3.49.
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Add 331+349 exact hundredths = 680 hundredths = 6.80.