Estimating Differences

Estimating means....

• Take a guess.

• Find the exact answer.

• About how much.

• Add or subtract.

Estimate the difference.

82 - 19 =

• 100

• 60

• 65

• 70

Estimate the difference.

91 - 11 =

• 80

• 90

• 100

• 78

Estimate the difference.

59 - 32 =

• 91

• 90

• 30

• 40

Estimate the difference.

413 - 218 =

• 600

• 200

• 700

• 100

Estimate the difference.

574 - 310 =

• 500

• 300

• 884

• 350

Estimate the difference.

17 - 10 =

• 0

• 7

• 5

• 10