Why practice estimation if calculators are exact?

Estimating tells you whether an exact answer is reasonable. It is the fastest way to catch a misplaced decimal point or a wrong keystroke.

How do I print or save these worksheets as a PDF?

Click Print worksheet and choose your printer, or pick “Save as PDF” as the destination to keep a digital copy. The answer key prints on its own page.

Can I get a fresh set of problems?

Yes. Click New problems for a brand new randomly generated worksheet, as many times as you like.

Is this worksheet generator free?

Yes. Every generator on the site is free to use, with no account, no watermark and unlimited printing for classroom or home use.

Estimation worksheet generator

Estimation practice that builds number sense: round each number to the leading place, then add, subtract or multiply.

Estimation

Name: Date:

1.
Estimate 984 + 479 by rounding to the nearest 100.
2.
Estimate 612 + 863 by rounding to the nearest 100.
3.
Estimate 631 + 509 by rounding to the nearest 100.
4.
Estimate 304 + 824 by rounding to the nearest 100.
5.
Estimate 997 + 868 by rounding to the nearest 100.
6.
Estimate 594 + 959 by rounding to the nearest 100.
7.
Estimate 917 + 976 by rounding to the nearest 100.
8.
Estimate 720 + 435 by rounding to the nearest 100.
9.
Estimate 604 + 478 by rounding to the nearest 100.
10.
Estimate 829 + 898 by rounding to the nearest 100.
11.
Estimate 734 + 834 by rounding to the nearest 100.
12.
Estimate 840 + 739 by rounding to the nearest 100.
13.
Estimate 589 + 304 by rounding to the nearest 100.
14.
Estimate 494 + 403 by rounding to the nearest 100.
15.
Estimate 813 + 324 by rounding to the nearest 100.
16.
Estimate 458 + 298 by rounding to the nearest 100.
17.
Estimate 721 + 945 by rounding to the nearest 100.
18.
Estimate 510 + 408 by rounding to the nearest 100.
19.
Estimate 250 + 760 by rounding to the nearest 100.
20.
Estimate 856 + 285 by rounding to the nearest 100.

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Estimation — Answer Key

Name: Date:

1.
Estimate 984 + 479 by rounding to the nearest 100.
1500
2.
Estimate 612 + 863 by rounding to the nearest 100.
1500
3.
Estimate 631 + 509 by rounding to the nearest 100.
1100
4.
Estimate 304 + 824 by rounding to the nearest 100.
1100
5.
Estimate 997 + 868 by rounding to the nearest 100.
1900
6.
Estimate 594 + 959 by rounding to the nearest 100.
1600
7.
Estimate 917 + 976 by rounding to the nearest 100.
1900
8.
Estimate 720 + 435 by rounding to the nearest 100.
1100
9.
Estimate 604 + 478 by rounding to the nearest 100.
1100
10.
Estimate 829 + 898 by rounding to the nearest 100.
1700
11.
Estimate 734 + 834 by rounding to the nearest 100.
1500
12.
Estimate 840 + 739 by rounding to the nearest 100.
1500
13.
Estimate 589 + 304 by rounding to the nearest 100.
900
14.
Estimate 494 + 403 by rounding to the nearest 100.
900
15.
Estimate 813 + 324 by rounding to the nearest 100.
1100
16.
Estimate 458 + 298 by rounding to the nearest 100.
800
17.
Estimate 721 + 945 by rounding to the nearest 100.
1600
18.
Estimate 510 + 408 by rounding to the nearest 100.
900
19.
Estimate 250 + 760 by rounding to the nearest 100.
1100
20.
Estimate 856 + 285 by rounding to the nearest 100.
1200

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Frequently asked questions

Why practice estimation if calculators are exact?: Estimating tells you whether an exact answer is reasonable. It is the fastest way to catch a misplaced decimal point or a wrong keystroke.
How do I print or save these worksheets as a PDF?: Click Print worksheet and choose your printer, or pick “Save as PDF” as the destination to keep a digital copy. The answer key prints on its own page.
Can I get a fresh set of problems?: Yes. Click New problems for a brand new randomly generated worksheet, as many times as you like.
Is this worksheet generator free?: Yes. Every generator on the site is free to use, with no account, no watermark and unlimited printing for classroom or home use.