Practice Estimating Involving Addition and Subtraction

Estimate the answer to the following problem, by rounding to the nearest hundred.

• 1,000

• 900

• 800

• 700

Estimate the sum by rounding to the nearest dollar.

• $4.00

• $3.00

• $5.00

• $2.00

Round to the nearest ten and then find the estimated sum.

• 100

• 90

• 80

• 75

Round to the nearest ten and then find the estimated difference.

• 20

• 50

• 30

• 40

To estimate the answer to the following problem, round 64 to ______.

• 50

• 60

• 40

• 30

Estimate the difference by rounding to the nearest hundred.

• 700

• 600

• 800

• 500

Danny had 210 hockey cards. Alex had 330 hockey cards. Estimate how many cards the two boys had together by rounding to the nearest hundred.

• 600 hockey cards

• 300 hockey cards

• 500 hockey cards

• 400 hockey cards

Estimate the sum by rounding to the nearest hundred.

• 500

• 600

• 700

• 400

A mother and daughter go horseback riding. They want to share a horse. The maximum weight a horse can hold is 250 lbs. The mom weighs 186 lbs and the daughter weighs 69 lbs. They can share a horse.

• True

• False

Estimate the total of the following purchases: a 12 pound turkey that cost $9.60, a can of gravy for $1.59, and a 10 pound bag of potatoes for $5.99.

• 22

• 20

• 19

• 18