Grade 3 · Math · Number sense

3rd Grade Rounding to 10 and 100 worksheets

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Version

Rounding to 10 and 100

Grade 3 Math Worksheet

NameDate

Circle the answer.

1.
Round 383 to the nearest ten.
- 370
- 400
- 380
- 390
2.
Round 426 to the nearest hundred.
- 300
- 500
- 430
- 400
3.
Which ten is just below 709, and which ten is just above it?
- 690 and 700
- 700 and 710
- 700 and 800
- 710 and 720
4.
Which number rounds to 400 when rounded to the nearest hundred?
- 349
- 451
- 362
- 330
5.
Round 497 to the nearest ten.
- 400
- 500
- 510
- 490
6.
Round 625 to the nearest ten.
- 630
- 600
- 620
- 640
7.
Round 550 to the nearest hundred.
- 700
- 500
- 600
- 550
8.
Which ten is just below 341, and which ten is just above it?
- 330 and 340
- 350 and 360
- 340 and 350
- 300 and 400
9.
Which number rounds to 200 when rounded to the nearest hundred?
- 251
- 260
- 130
- 221
10.
Round 796 to the nearest ten.
- 800
- 810
- 790
- 700

3rd Grade Rounding to 10 and 100 worksheet 1 – printable PDF — Download PDF: 1 2 3 4 5 6

About this worksheet

Rounding helps third graders estimate with numbers that are easier to use mentally. The skill is not simply chopping off digits; students must decide which benchmark a number is closest to. The hardest cases are halfway values and numbers that round up into the next hundred or to 1,000. This worksheet rotates between rounding to the nearest ten, rounding to the nearest hundred, finding the tens just below and above a number, and choosing which number rounds to a given ten or hundred.

Number-line visuals appear on the support sheet, where they show the interval and hide no answer. Support versions use numbers far from the halfway point. Standard versions add halfway values such as 345 and 250 and numbers that round up into a new hundred. Challenge versions round to 1,000, use two rounding rules at once, and estimate sums. Encourage your child to name the two possible rounded numbers first, then decide which one is nearer.

What your child will learn

Round numbers to the nearest ten
Round numbers to the nearest hundred
Use halfway points on a number line
Choose estimates from place-value clues

Common Core standard: 3.NBT.A.1

Worked example

347 rounds to 350 to the nearest ten because it is closer to 350 than 340.

Common mistake

Changing every digit after the rounded place without checking which benchmark is closer.

Helpful hint

Find the two benchmarks, then choose the closer one.

Next skill: Addition Within 1,000 Earlier: Compare Numbers to 10,000

Questions parents ask

What is the most common mistake with rounding to 10 and 100?

Changing every digit after the rounded place without checking which benchmark is closer.

How can I help my child with rounding to 10 and 100?

Find the two benchmarks, then choose the closer one.

Are these 3rd grade math worksheets free to print?

Yes. All 6 printable versions on this page are free to download and print, with no account needed.

More 3rd grade number sense

See all number sense

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