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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 5 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 551 to the nearest ten
2.Round 173 to the nearest ten
3.Round 928 to the nearest ten
4.Round 151 to the nearest ten
5.Round 914 to the nearest ten
6.Round 175 to the nearest ten
7.Round 342 to the nearest ten
8.Round 985 to the nearest ten
9.Round 615 to the nearest ten
10.Round 631 to the nearest ten
11.Round 618 to the nearest ten
12.Round 206 to the nearest ten

LessonPrint · 3.NBT.A.1 · Set 5 · free to copy for classroom use

Answer key — Round then Estimate

Set 5. Prints on its own sheet.

  1. 1.550
  2. 2.170
  3. 3.930
  4. 4.150
  5. 5.910
  6. 6.180
  7. 7.340
  8. 8.990
  9. 9.620
  10. 10.630
  11. 11.620
  12. 12.210

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