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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 25 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 750 to the nearest ten
2.Round 429 to the nearest ten
3.Round 153 to the nearest ten
4.Round 591 to the nearest ten
5.Round 378 to the nearest ten
6.Round 220 to the nearest ten
7.Round 845 to the nearest ten
8.Round 644 to the nearest ten
9.Round 647 to the nearest ten
10.Round 824 to the nearest ten
11.Round 985 to the nearest ten
12.Round 960 to the nearest ten

LessonPrint · 3.NBT.A.1 · Set 25 · free to copy for classroom use

Answer key — Round then Estimate

Set 25. Prints on its own sheet.

  1. 1.750
  2. 2.430
  3. 3.150
  4. 4.590
  5. 5.380
  6. 6.220
  7. 7.850
  8. 8.640
  9. 9.650
  10. 10.820
  11. 11.990
  12. 12.960

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