Share Estimate sums and differences of decimals
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Round the decimal to the nearest one. Then add or subtract. 6.91 − 4.2 = _____
3
Round the decimal to the nearest one. Then add or subtract. 46.509 + 18.017 = _____
65
Round the decimal to the nearest one. Then add or subtract. $8.97 – $0.54
8
Round the decimal to the nearest one. Then add or subtract. 3.31 + 7.14
10
Round the decimal to the nearest one. Then add or subtract. $54.63 + $28.01
83
Round the decimal to the nearest ten. Then add or subtract. 21.7 + 71.2
20
Round the decimal to the nearest ten. Then add or subtract. $89.00 – $45.78
40
An American elm tree measures 23.46 meters tall while a dogwood tree measures 11.9 meters tall. How much taller is the American elm tree when you round to the nearest one? To the nearest ten?
11meters
Solve by rounding to the nearest one. Aluminum and tin are both metals. The standard atomic weight for aluminum is 26.98. The standard atomic weight for tin is 118.71. Estimate the difference between the standard atomic weights of these two
92
Round the decimal to the nearest one. Then add or subtract. 9.086 − 2.419 = ____
7
Round the decimal to the nearest one. Then add or subtract. 3.872 + 2.409 = ____
6
