Estimating Sums and Differences by Rounding

Round to the nearest ten thousand, then estimate the sum.

65,447 + 124,557

• 80,000

• 170,000

• 180,000

• 190,000

Round to the nearest ten thousand, then estimate the difference:

47,623 - 12,385 =

• 40

• 34,238

• 40,000

• 30,000

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

• 120

• 150

• 140

• 136

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

• 110

• 100

• 111

• 90

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

• 100

• 200

• 0

• 300

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

• 700

• 600

• 758

• 800

Estimate the difference of 470-289 by rounding to the nearest hundreds

• 300

• 100

• 181

• 200

Estimate the difference of 7,900-2,999 by rounding to the nearest thousands

• 6,000

• 4,000

• 5,000

• 3,000

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

There was 926 people at basketball tournament. 607 people left before noon. Which is the best estimate of the number of people who stayed?

• 150

• 250

• 300

• 500