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Rounding and Estimating is a free printable Grade 5 math worksheet on using rounding to check a calculation, aligned to Common Core standard 5.NBT.A.4. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Rounding and Estimating

5.NBT.A.4

NameDate

Estimate first, then work it out.

1.Estimate 17.09 + 21.72 by rounding each number to the nearest whole number, then work it out.
2.Estimate 6.05 + 20.91 by rounding each number to the nearest whole number, then work it out.
3.Estimate 9.28 + 19.25 by rounding each number to the nearest whole number, then work it out.
4.Estimate 4.48 + 14.80 by rounding each number to the nearest whole number, then work it out.
5.Estimate 36.53 − 7.19 by rounding each number to the nearest whole number, then work it out.
6.Estimate 16.21 − 4.58 by rounding each number to the nearest whole number, then work it out.
7.Estimate 37.11 − 7.32 by rounding each number to the nearest whole number, then work it out.
8.Estimate 23.73 − 7.45 by rounding each number to the nearest whole number, then work it out.

LessonPrint · 5.NBT.A.4 · Set 4 · free to copy for classroom use

Answer key — Rounding and Estimating

Set 4. Prints on its own sheet.

  1. 1.about 39; exactly 38.81
  2. 2.about 27; exactly 26.96
  3. 3.about 28; exactly 28.53
  4. 4.about 19; exactly 19.28
  5. 5.about 30; exactly 29.34
  6. 6.about 11; exactly 11.63
  7. 7.about 30; exactly 29.79
  8. 8.about 17; exactly 16.28

Last reviewed 2026-09-05. Aligned to 5.NBT.A.4 of the Common Core State Standards for Mathematics.