Chapter 13 — Practice 2
18 original mixed questions
Practice earlier ideas together. Check answers only after you have completed an attempt.
Calculate 5.5 + 0.5.
Show answer and reasoning
Combine 55 and 5 tenths to get 60 tenths, or 6.0.
Calculate 1.6 + 2.8.
Show answer and reasoning
The tenths combine to 14 tenths, which makes one whole and 4 tenths. Add whole units to get 4.4.
Calculate 8.2 − 1.9.
Show answer and reasoning
Rename 8.2 as 7 wholes and 12 tenths. Subtract 1 whole and 9 tenths; result 6.3.
Calculate 2.73 + 3.48.
Show answer and reasoning
Add 273+348 exact hundredths = 621 hundredths = 6.21.
Calculate 1.00 − 0.23.
Show answer and reasoning
Rename 1.00 as 100 hundredths; subtract 23 hundredths to get 77 hundredths.
Calculate 3.29 − 1.26.
Show answer and reasoning
329 hundredths minus 126 hundredths = 203 hundredths = 2.03.
An item costs $2.42 and another costs $2.02. What is their exact combined price?
Show answer and reasoning
Add cents exactly: 242+202=444 cents = $4.44.
Calculate 4.3 + 0.4.
Show answer and reasoning
Combine 43 and 4 tenths to get 47 tenths, or 4.7.
Calculate 2.7 + 0.7.
Show answer and reasoning
The tenths combine to 14 tenths, which makes one whole and 4 tenths. Add whole units to get 3.4.
Calculate 7.2 − 1.8.
Show answer and reasoning
Rename 7.2 as 6 wholes and 12 tenths. Subtract 1 whole and 8 tenths; result 5.4.
Calculate 6.63 + 3.24.
Show answer and reasoning
Add 663+324 exact hundredths = 987 hundredths = 9.87.
Calculate 1.00 − 0.67.
Show answer and reasoning
Rename 1.00 as 100 hundredths; subtract 67 hundredths to get 33 hundredths.
Calculate 5.54 − 1.04.
Show answer and reasoning
554 hundredths minus 104 hundredths = 450 hundredths = 4.50.
An item costs $1.41 and another costs $1.63. What is their exact combined price?
Show answer and reasoning
Add cents exactly: 141+163=304 cents = $3.04.
Calculate 3.4 + 0.4.
Show answer and reasoning
Combine 34 and 4 tenths to get 38 tenths, or 3.8.
Calculate 3.9 + 0.7.
Show answer and reasoning
The tenths combine to 16 tenths, which makes one whole and 6 tenths. Add whole units to get 4.6.
Calculate 2.2 − 1.8.
Show answer and reasoning
Rename 2.2 as 1 wholes and 12 tenths. Subtract 1 whole and 8 tenths; result 0.4.
Calculate 5.76 + 2.55.
Show answer and reasoning
Add 576+255 exact hundredths = 831 hundredths = 8.31.