Estimation

What is the estimated sum of 150 + 250?

• 350

• 400

• 450

• 500

Estimate 453 + 210.

• 650

• 700

• 750

• 800

Estimate 300 + 450.

• 700

• 750

• 800

• 850

What is the estimated sum of 32 + 66?

• 90

• 95

• 100

• 105

What is the estimated sum of 209 + 411?

• 500

• 600

• 700

• 800

Estimate 48 + 37.

• 85

• 90

• 92

• 95

What is the estimated sum of 89 + 22?

• 108

• 110

• 112

• 115

Estimate 24 + 67.

• 85

• 90

• 92

• 88

What is the estimated sum of 123 + 456?

• 550

• 600

• 650

• 700

When do we use estimation?

• When we need a quick answer without calculating the exact number.

• When we want to find the precise value of a number.

• When we have all the time in the world to calculate.

• When we are unsure about the data we have.