Numbers_232

Estimate the following sum by first rounding each decimal to the nearest hundred.

428.1 + 186.5 + 210.62

What is a reasonable estimate of the sum of 15.66 and 9.88?

• 50

• 26

• 6

• .23

Round 999.999 and 67.584 to the nearest thousandth, then compare.

• 1,056.5

• 1,067.583

• 1,070.6

• 1,067.58

Estimate the sum.

8.1 + 3.6 + 7.8 =

• 30

• 50

• 20

• 10

Estimate by rounding to the nearest ten: 23.78 + 45.10

• 60

• 68

• 70

• 68.9