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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 3 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 495 to the nearest ten
2.Round 887 to the nearest ten
3.Round 430 to the nearest ten
4.Round 542 to the nearest ten
5.Round 885 to the nearest ten
6.Round 580 to the nearest ten
7.Round 270 to the nearest ten
8.Round 650 to the nearest ten
9.Round 932 to the nearest ten
10.Round 143 to the nearest ten
11.Round 870 to the nearest ten
12.Round 379 to the nearest ten

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

Answer key — Round then Estimate

Set 3. Prints on its own sheet.

  1. 1.500
  2. 2.890
  3. 3.430
  4. 4.540
  5. 5.890
  6. 6.580
  7. 7.270
  8. 8.650
  9. 9.930
  10. 10.140
  11. 11.870
  12. 12.380

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