Estimate Sums and Differences

Estimate the sum by rounding each number to the nearest whole number and then adding.

3.78 + 7.249

The sum is approximately

Estimate the difference by rounding each number to the nearest whole number and then subtracting.

10.323 − 1.369

The difference is approximately

Estimate the difference by rounding each number to the nearest whole number and then subtracting.

7.4 − 3.7

The difference is approximately

Estimate the difference by rounding each number to the nearest whole number and then subtracting.

5.104 − 1.972

The difference is approximately

Estimate the difference by rounding each number to the nearest whole number and then subtracting.

10.477 − 3.316

The difference is approximately

Estimate the difference by rounding each number to the nearest whole number and then subtracting.

7.096 − 4.774

The difference is approximately

Estimate the sum by rounding each number to the nearest whole number and then adding.

10.17 + 5.13 + 2.6

The sum is approximately

Estimate to the nearest ten.

235 + 421

Estimate to the nearest ten.

563 - 319

Estimate the sum of 458 and 247 to the nearest hundred.