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Mixed Numbers — Unlike Denominators is a free printable Grade 5 math worksheet on adding and subtracting mixed numbers with a common denominator, aligned to Common Core standard 5.NF.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 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 1 of 25 · the same problems every time you open this link.

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All 25 sets ask different questions.

Mixed Numbers — Unlike Denominators

5.NF.A.1

NameDate

Work out each answer. Simplify where you can.

1.6 1/2 + 3 2/4 =
2.3 1/2 + 3 1/4 =
3.5 3/8 + 3 2/3 =
4.3 4/8 + 4 2/3 =
5.6 1/3 + 3 1/2 =
6.2 1/2 + 4 1/6 =
7.5 1/2 − 4 1/3 =
8.6 1/3 − 2 1/2 =
9.5 1/2 − 1 4/6 =
10.2 3/4 − 1 1/2 =
11.3 4/8 − 2 1/2 =
12.6 1/8 − 2 1/3 =

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

Answer key — Mixed Numbers — Unlike Denominators

Set 1. Prints on its own sheet.

  1. 1.10
  2. 2.6 3/4
  3. 3.9 1/24
  4. 4.8 1/6
  5. 5.9 5/6
  6. 6.6 2/3
  7. 7.1 1/6
  8. 8.3 5/6
  9. 9.3 5/6
  10. 10.1 1/4
  11. 11.1
  12. 12.3 19/24

Questions about Mixed Numbers — Unlike Denominators

What does the Mixed Numbers — Unlike Denominators worksheet cover?

It practices adding and subtracting mixed numbers with a common denominator — 12 questions for Grade 5, all on Common Core 5.NF.A.1: Add and subtract fractions with different denominators. The instruction to students is “Work out each answer. Simplify where you can”, and the answer key follows on the next sheet.

Which Common Core standard does Mixed Numbers — Unlike Denominators practice?

CCSS.MATH.CONTENT.5.NF.A.1 — 5.NF.A.1, under Number & Operations — Fractions for Grade 5. The published standard reads: “Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Mixed Numbers — Unlike Denominators is written for Grade 5, typically ages 10-11. It is one of the sheets on 5.NF.A.1, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.

Does Mixed Numbers — Unlike Denominators come with an answer key?

Yes. All 12 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 Mixed Numbers — Unlike Denominators 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 Mixed Numbers — Unlike Denominators free to print and photocopy?

Yes. Mixed Numbers — Unlike Denominators, 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.NF.A.1

Add and subtract fractions with different denominators.

All Grade 5 worksheets

Last reviewed 2026-09-05. Aligned to 5.NF.A.1 of the Common Core State Standards for Mathematics.