+ 513

sum

+ 500

800

+ 513

839

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Name
Grade
School

Date
Questions10
Score

example

Addition

326

+ 513

sum

+ 513

sum

Estimated Sum

300

+ 500

800

+ 500

800

Actual Sum

326

+ 513

839

+ 513

839

1

Addition

624

+ 306

sum

+ 306

sum

Estimated Sum

Actual Sum

2

Addition

576

+ 505

sum

+ 505

sum

Estimated Sum

Actual Sum

3

Addition

359

+ 612

sum

+ 612

sum

Estimated Sum

Actual Sum

4

Addition

249

+ 222

sum

+ 222

sum

Estimated Sum

Actual Sum

5

Addition

511

+ 620

sum

+ 620

sum

Estimated Sum

Actual Sum

6

Addition

643

+ 511

sum

+ 511

sum

Estimated Sum

Actual Sum

7

Addition

332

+ 729

sum

+ 729

sum

Estimated Sum

Actual Sum

8

Addition

223

+ 555

sum

+ 555

sum

Estimated Sum

Actual Sum

9

Addition

554

+ 525

sum

+ 525

sum

Estimated Sum

Actual Sum

10

Addition

412

+ 503

sum

+ 503

sum

Estimated Sum

Actual Sum

Answers Key

1

Addition

624

+ 306

sum

+ 306

sum

Estimated Sum

600

+ 300

900

+ 300

900

Actual Sum

624

+ 306

930

+ 306

930

2

Addition

576

+ 505

sum

+ 505

sum

Estimated Sum

600

+ 500

1100

+ 500

1100

Actual Sum

576

+ 505

1081

+ 505

1081

3

Addition

359

+ 612

sum

+ 612

sum

Estimated Sum

400

+ 600

1000

+ 600

1000

Actual Sum

359

+ 612

971

+ 612

971

4

Addition

249

+ 222

sum

+ 222

sum

Estimated Sum

200

+ 200

400

+ 200

400

Actual Sum

249

+ 222

471

+ 222

471

5

Addition

511

+ 620

sum

+ 620

sum

Estimated Sum

500

+ 600

1100

+ 600

1100

Actual Sum

511

+ 620

1131

+ 620

1131

6

Addition

643

+ 511

sum

+ 511

sum

Estimated Sum

600

+ 500

1100

+ 500

1100

Actual Sum

643

+ 511

1154

+ 511

1154

7

Addition

332

+ 729

sum

+ 729

sum

Estimated Sum

300

+ 700

1000

+ 700

1000

Actual Sum

332

+ 729

1061

+ 729

1061

8

Addition

223

+ 555

sum

+ 555

sum

Estimated Sum

200

+ 600

800

+ 600

800

Actual Sum

223

+ 555

778

+ 555

778

9

Addition

554

+ 525

sum

+ 525

sum

Estimated Sum

600

+ 500

1100

+ 500

1100

Actual Sum

554

+ 525

1079

+ 525

1079

10

Addition

412

+ 503

sum

+ 503

sum

Estimated Sum

400

+ 500

900

+ 500

900

Actual Sum

412

+ 503

915

+ 503

915

Estimated sum of 3-digit numbers addition by rounding to the nearest hundred worksheet with answers to practice & learn 3rd grade math problems on estimation is available online for free in printable & downloadable (pdf & image) format. Tap on PRINT, PDF or IMAGE button to print or download this 3rd grade estimated addition worksheet for quick approximation by rounding the 3-digit addends to the nearest 100.

In this third grade math worksheet, students are required to write the estimated sum & actual sum for the given 3-digit addends by rounding off to the nearest hundred as like in the given solved example of this online workbook for estimation problems. To find the estimated sum, round the given 3-digit addends to the nearest hundred numbers and then perform the addition. To find the actual sum, add the given 3-digit addends directly and write the sum.

Teachers, parents or students can check or validate the completed math workbook containing the 3rd grade math questions for writing estimated & actual sum for 3-digit addition by using the corresponding answers key.

To effectively assist math learning or teaching, RankUpturn allow registered students, teachers or parents to generate unlimited set of grade-3 math questions & answers by using this "**NEW WORKSHEET**" button to prepare or practice exam, assignments, classwork or homework problems & solutions on estimated sum for 3-digit numbers by rounding addends to the nearest 100.

Related Worksheets

- Estimate Addition by Rounding to the Nearest Tens for 3-Digit Numbers
- Estimate Subtraction by Rounding to the Nearest Tens for 3-Digit Numbers
- Rounding to the Nearest Hundred for 3-Digit Numbers
- Estimate Subtraction by Rounding to the Nearest Hundred for 3-Digit Numbers
- Rounding to the Nearest Tens for 4-Digit Numbers
- Estimate Addition by Rounding to the Nearest 10 for 4-Digit Numbers

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Kitty

Hey! I'm Kitty

I can answer you simple math queries!

Hey! I'm Kitty

I can answer you simple math queries!

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