Estimating Sums

Finish the sentence:

Estimating is ...

• An exact answer.

• A random guess

• A guess that is very close to the actual number.

• Another word for equal to.

Estimate to the nearest ten.

578

• 600

• 570

• 580

• 575

Estimate the sum: 62+35

• 95
• 90
• 100
• 97

Estimate the sum: 123+456

• 579
• 600
• 650
• 500

Estimate the sum: 793+964

• 1,600
• 1,800
• 1,700
• 1,500

Estimate the sum: 5,023+6,243

• 12,000
• 9,000
• 11,000
• 11,266

A museum has 237 works of art on the first floor. The second floor has 349 works of art. The third floor has 219 works of art. About how many works of art in all? (Use greatest place value.)

• 800

• 700

• 750

• 660

• 400 + 200 = 600
• 500 + 200 = 600
• 500 + 200 = 700
• 400 + 200 = 700

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

• 700
• 600
• 758
• 800

Tracy ordered 325 pet toys and 165 bags of dog food for her new pet store. Which is the best estimate of the total number of items Tracy ordered?

• 400
• 500
• 600
• 700