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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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All 25 sets ask different questions.

Rounding and Estimating

5.NBT.A.4

NameDate

Estimate first, then work it out.

1.Estimate 6.42 + 11.39 by rounding each number to the nearest whole number, then work it out.
2.Estimate 2.90 + 25.22 by rounding each number to the nearest whole number, then work it out.
3.Estimate 25.84 + 17.43 by rounding each number to the nearest whole number, then work it out.
4.Estimate 12.11 + 29.39 by rounding each number to the nearest whole number, then work it out.
5.Estimate 18.22 − 4.42 by rounding each number to the nearest whole number, then work it out.
6.Estimate 23.41 − 8.12 by rounding each number to the nearest whole number, then work it out.
7.Estimate 14.57 − 8.59 by rounding each number to the nearest whole number, then work it out.
8.Estimate 31.37 − 2.72 by rounding each number to the nearest whole number, then work it out.

LessonPrint · 5.NBT.A.4 · Set 1 · free to copy for classroom use

Answer key — Rounding and Estimating

Set 1. Prints on its own sheet.

  1. 1.about 17; exactly 17.81
  2. 2.about 28; exactly 28.12
  3. 3.about 43; exactly 43.27
  4. 4.about 41; exactly 41.5
  5. 5.about 14; exactly 13.8
  6. 6.about 15; exactly 15.29
  7. 7.about 6; exactly 5.98
  8. 8.about 28; exactly 28.65

Questions about Rounding and Estimating

What does the Rounding and Estimating worksheet cover?

It practices using rounding to check a calculation — 8 questions for Grade 5, all on Common Core 5.NBT.A.4: Round decimals. The instruction to students is “Estimate first, then work it out”, and the answer key follows on the next sheet.

Which Common Core standard does Rounding and Estimating practice?

CCSS.MATH.CONTENT.5.NBT.A.4 — 5.NBT.A.4, under Number & Operations in Base Ten for Grade 5. The published standard reads: “Use place value understanding to round decimals to any place.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Rounding and Estimating is written for Grade 5, typically ages 10-11. It is one of the sheets on 5.NBT.A.4, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.

Does Rounding and Estimating come with an answer key?

Yes. All 8 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.

How many different versions of Rounding and Estimating can I print?

25 — one per student, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.

Is Rounding and Estimating free to print and photocopy?

Yes. Rounding and Estimating, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.

More practice for 5.NBT.A.4

Round decimals.

All Grade 5 worksheets

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