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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 23 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 808 to the nearest ten
2.Round 575 to the nearest ten
3.Round 446 to the nearest ten
4.Round 593 to the nearest ten
5.Round 805 to the nearest ten
6.Round 929 to the nearest ten
7.Round 671 to the nearest ten
8.Round 901 to the nearest ten
9.Round 786 to the nearest ten
10.Round 130 to the nearest ten
11.Round 406 to the nearest ten
12.Round 517 to the nearest ten

LessonPrint · 3.NBT.A.1 · Set 23 · free to copy for classroom use

Answer key — Round then Estimate

Set 23. Prints on its own sheet.

  1. 1.810
  2. 2.580
  3. 3.450
  4. 4.590
  5. 5.810
  6. 6.930
  7. 7.670
  8. 8.900
  9. 9.790
  10. 10.130
  11. 11.410
  12. 12.520

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