Rounding
Round to Underlined Digit
Estimate Sum
Estimate Difference
Word Problems
100

Round 32 to the nearest ten

30

100

137

100

100

Estimate the sum by rounding to the nearest ten: 

52 + 38

50 + 40 = 90

100

Estimate the difference by rounding to the nearest ten:

57 - 42

60 - 40 = 20

100

Max and Sam went to Main Event. Max had 67 tokens, and Sam had 32 tokens.
Rounded to the nearest ten, how many more tokens did Max have than Sam?

70 - 30 = 40

200

Round 385 to the nearest hundred

400

200

5,492

5,500

200

Estimate the sum by rounding to the nearest hundred:

421 + 268

400 + 300 = 700

200

Estimate the difference by rounding to the nearest ten:

657 - 442

660 - 440 = 220

200

Mrs. Miller has 200 chickens.  Last week, her chickens laid 342 eggs. This week, they laid 451 eggs. Rounded to the nearest ten, what is the difference in the number of eggs laid each week?

500 - 300 = 200

300

Round 482 to the nearest ten

490

300

5,837

5,840

300

Estimate the sum by rounding to the nearest ten:

549 + 250

500 + 300 = 800

300

Estimate the difference by rounding to the nearest ten:

575 - 242

580 - 240 = 340

300

Nancy grew 561 pumpkins and Mary grew 428 pumpkins this year. Rounding to the nearest ten about how many pumpkins did they grow?

560 + 430 = 990

400

Round 5,294 to the nearest hundred

5,200

400

2,492

2,500

400

Estimate the sum by rounding to the nearest hundred:

2,756 + 2,242

2,800 + 2,200 = 5,000

400

Estimate the difference by rounding to the nearest hundred:

4,579 - 3,272

4,600 - 3,300 = About 1,300

400

Mr. K participated in the Nathan’s Hot Dog Eating Contest. Together, all of the contestants ate 1,679 hot dogs. Rounded to the nearest hundred, about how
many hot dogs did they all eat?

1,700

500

Round 7,173 to the nearest ten

7,170

500

6,842

6,840

500

Estimate the sum by rounding to the nearest ten: 

5,323 + 3,436

5,320 + 3,440 =  8,760

500

Estimate the difference by rounding to the nearest ten:

4,586 - 3,274

4,590 - 3,370 = 1,220

500

Scott scored 2,852 points on the video game and Dan scored 1,823 points. Rounded to the nearest ten, about how many points did they score?

2,850 + 1,820 = 4,670

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