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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 11 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 451 to the nearest ten
2.Round 345 to the nearest ten
3.Round 141 to the nearest ten
4.Round 619 to the nearest ten
5.Round 902 to the nearest ten
6.Round 286 to the nearest ten
7.Round 656 to the nearest ten
8.Round 583 to the nearest ten
9.Round 503 to the nearest ten
10.Round 184 to the nearest ten
11.Round 405 to the nearest ten
12.Round 494 to the nearest ten

LessonPrint · 3.NBT.A.1 · Set 11 · free to copy for classroom use

Answer key — Round then Estimate

Set 11. Prints on its own sheet.

  1. 1.450
  2. 2.350
  3. 3.140
  4. 4.620
  5. 5.900
  6. 6.290
  7. 7.660
  8. 8.580
  9. 9.500
  10. 10.180
  11. 11.410
  12. 12.490

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