Estimating sums and differences

Estimate the sum of 327+431 by rounding to the nearest hundreds

• 600

• 700

• 750

• 800

Estimate the sum of 120+190 by rounding to the nearest hundreds

• 0

• 100

• 200

• 300

Estimate the sum of 52+59 by rounding to the nearest tens

• 90

• 100

• 110

• 111

Estimate the sum of 37+99 by rounding to the nearest tens

• 120

• 130

• 140

• 150

Round to the nearest hundred, then estimate:

642 − 137

• 400

• 500

• 600

• 700

Estimate the difference to

89-31=

• 40

• 50

• 60

• 70

Estimate the difference to

71-37=

• 30

• 35

• 40

• 45

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

8.598 + 2.78

• 10

• 11

• 12

• 13

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

10.17 + 5.13 + 2.6

• 16

• 17

• 18

• 19

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

7.096 − 4.774

• 2

• 3

• 4

• 5