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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 20 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 307 to the nearest ten
2.Round 492 to the nearest ten
3.Round 707 to the nearest ten
4.Round 806 to the nearest ten
5.Round 796 to the nearest ten
6.Round 337 to the nearest ten
7.Round 537 to the nearest ten
8.Round 226 to the nearest ten
9.Round 287 to the nearest ten
10.Round 109 to the nearest ten
11.Round 847 to the nearest ten
12.Round 573 to the nearest ten

LessonPrint · 3.NBT.A.1 · Set 20 · free to copy for classroom use

Answer key — Round then Estimate

Set 20. Prints on its own sheet.

  1. 1.310
  2. 2.490
  3. 3.710
  4. 4.810
  5. 5.800
  6. 6.340
  7. 7.540
  8. 8.230
  9. 9.290
  10. 10.110
  11. 11.850
  12. 12.570

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