Estimate Decimal and Whole

Which of the following is the best estimate for the equation:

15.9 + 12.03

• 28

• 15

• 37

• 18

Which of the following is the best estimate for the equation:

61.44 + 88.3

• 100

• 120

• 150

• 200

Estimate the difference by rounding each decimal to the nearest ten.

17.52 - 12.03

• 12

• 11

• 15

• 10

An airplane named Hawkeye flies 375.52 mph. An airplane named Foxbat flies 1,864.29 mph. About how much faster is the Foxbat than the Hawkeye? Round the decimals to the nearest whole number.

The lengths for four horseback riding trails is shown below. Estimate the total length of all the trails by rounding to the nearest whole number.

Fran bought sneakers for $54.26 and a shirt for $34.34. If Fran started with $100, about how much money does she have left?

• $35

• $20

• $5

• $80

Estimate the difference by rounding each decimal to the nearest hundred.

376.8 - 109.5

• 100

• 200

• 300

• 400

Round 5.67 to the nearest whole number for estimation.

• 6

• 8

• 7

• 5

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

428.1 + 186.5

• 500

• 600

• 700

• 800

Round each decimal to the nearest whole number. Then add or subtract.

19.83 + 9.93