Estimate the sum by rounding addends to whole numbers. Then use a calculator to find the exact sum: 2.80 + 5.09 + 3.94 + 6.01.
A) 16; 17.84
B)18; 17.74
C) 18; 17.84
D)17; 16.74

Question

Quizplus · Accepted Answer

By rounding to the nearest whole number, we get 3 + 5 + 4 + 6 = 18. Using a calculator, the exact sum is 17.84. The closest answer choice is C with 18 as the estimated sum and 17.84 as the exact sum.

Estimate the Sum by Rounding Addends to Whole Numbers