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Round then Estimate is a free printable Grade 3 maths worksheet on using rounding to check an answer, aligned to Common Core standard 3.NBT.A.1. It prints 12 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 21 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Round then Estimate

3.NBT.A.1

NameDate

Round each number.

1.Round 266 to the nearest ten
2.Round 474 to the nearest ten
3.Round 155 to the nearest ten
4.Round 238 to the nearest ten
5.Round 537 to the nearest ten
6.Round 504 to the nearest ten
7.Round 244 to the nearest ten
8.Round 982 to the nearest ten
9.Round 768 to the nearest ten
10.Round 264 to the nearest ten
11.Round 718 to the nearest ten
12.Round 422 to the nearest ten

LessonPrint · 3.NBT.A.1 · Set 21 · free to copy for classroom use

Answer key — Round then Estimate

Set 21. Prints on its own sheet.

  1. 1.270
  2. 2.470
  3. 3.160
  4. 4.240
  5. 5.540
  6. 6.500
  7. 7.240
  8. 8.980
  9. 9.770
  10. 10.260
  11. 11.720
  12. 12.420

Last reviewed 2026-09-05. Aligned to 3.NBT.A.1 of the Common Core State Standards for mathematics.