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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.

Set 20 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.

Rounding and Estimating

5.NBT.A.4

NameDate

Estimate first, then work it out.

1.Estimate 25.69 + 25.93 by rounding each number to the nearest whole number, then work it out.
2.Estimate 18.34 + 3.21 by rounding each number to the nearest whole number, then work it out.
3.Estimate 11.16 + 11.18 by rounding each number to the nearest whole number, then work it out.
4.Estimate 2.47 + 6.85 by rounding each number to the nearest whole number, then work it out.
5.Estimate 30.44 − 7.77 by rounding each number to the nearest whole number, then work it out.
6.Estimate 30.67 − 5.77 by rounding each number to the nearest whole number, then work it out.
7.Estimate 36.38 − 4.64 by rounding each number to the nearest whole number, then work it out.
8.Estimate 33.22 − 8.76 by rounding each number to the nearest whole number, then work it out.

LessonPrint · 5.NBT.A.4 · Set 20 · free to copy for classroom use

Answer key — Rounding and Estimating

Set 20. Prints on its own sheet.

  1. 1.about 52; exactly 51.62
  2. 2.about 21; exactly 21.55
  3. 3.about 22; exactly 22.34
  4. 4.about 9; exactly 9.32
  5. 5.about 22; exactly 22.67
  6. 6.about 25; exactly 24.9
  7. 7.about 31; exactly 31.74
  8. 8.about 24; exactly 24.46

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