+ 423

sum

+ 420

660

+ 423

659

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Name
Grade
School

Date
Questions10
Score

example

Addition

236

+ 423

sum

+ 423

sum

Estimated Sum

240

+ 420

660

+ 420

660

Actual Sum

236

+ 423

659

+ 423

659

1

Addition

534

+ 216

sum

+ 216

sum

Estimated Sum

Actual Sum

2

Addition

486

+ 415

sum

+ 415

sum

Estimated Sum

Actual Sum

3

Addition

269

+ 522

sum

+ 522

sum

Estimated Sum

Actual Sum

4

Addition

159

+ 132

sum

+ 132

sum

Estimated Sum

Actual Sum

5

Addition

421

+ 530

sum

+ 530

sum

Estimated Sum

Actual Sum

6

Addition

553

+ 421

sum

+ 421

sum

Estimated Sum

Actual Sum

7

Addition

242

+ 639

sum

+ 639

sum

Estimated Sum

Actual Sum

8

Addition

133

+ 465

sum

+ 465

sum

Estimated Sum

Actual Sum

9

Addition

464

+ 435

sum

+ 435

sum

Estimated Sum

Actual Sum

10

Addition

322

+ 413

sum

+ 413

sum

Estimated Sum

Actual Sum

Answers Key

1

Addition

534

+ 216

sum

+ 216

sum

Estimated Sum

530

+ 220

750

+ 220

750

Actual Sum

534

+ 216

750

+ 216

750

2

Addition

486

+ 415

sum

+ 415

sum

Estimated Sum

490

+ 420

910

+ 420

910

Actual Sum

486

+ 415

901

+ 415

901

3

Addition

269

+ 522

sum

+ 522

sum

Estimated Sum

270

+ 520

790

+ 520

790

Actual Sum

269

+ 522

791

+ 522

791

4

Addition

159

+ 132

sum

+ 132

sum

Estimated Sum

160

+ 130

290

+ 130

290

Actual Sum

159

+ 132

291

+ 132

291

5

Addition

421

+ 530

sum

+ 530

sum

Estimated Sum

420

+ 530

950

+ 530

950

Actual Sum

421

+ 530

951

+ 530

951

6

Addition

553

+ 421

sum

+ 421

sum

Estimated Sum

550

+ 420

970

+ 420

970

Actual Sum

553

+ 421

974

+ 421

974

7

Addition

242

+ 639

sum

+ 639

sum

Estimated Sum

240

+ 640

880

+ 640

880

Actual Sum

242

+ 639

881

+ 639

881

8

Addition

133

+ 465

sum

+ 465

sum

Estimated Sum

130

+ 470

600

+ 470

600

Actual Sum

133

+ 465

598

+ 465

598

9

Addition

464

+ 435

sum

+ 435

sum

Estimated Sum

460

+ 440

900

+ 440

900

Actual Sum

464

+ 435

899

+ 435

899

10

Addition

322

+ 413

sum

+ 413

sum

Estimated Sum

320

+ 410

730

+ 410

730

Actual Sum

322

+ 413

735

+ 413

735

Estimated sum of 3-digit numbers addition by rounding to the nearest ten 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 10.

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 ten 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 ten 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 10.

Related Worksheets

- Estimate Addition by Rounding to the nearest Ten for 2-Digit Numbers
- Estimate Subtraction by Rounding to the nearest Ten for 2-Digit Numbers
- 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 Addition by Rounding to the Nearest Hundred for 3-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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