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Add Fractions — Unlike Denominators is a free printable Grade 5 maths worksheet on finding a common denominator to add, 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 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 1 of 25 · the same problems every time you open this link.

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One paper per pupil

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All 25 sets ask different questions.

Add Fractions — Unlike Denominators

5.NF.A.1

NameDate

Work out each answer. Simplify where you can.

1.2/3 + 1/4 =
2.4/6 + 5/10 =
3.1/6 + 1/5 =
4.3/5 + 4/12 =
5.2/3 + 1/2 =
6.2/4 + 5/6 =
7.3/4 + 2/5 =
8.2/5 + 1/2 =
9.4/6 + 1/3 =
10.5/6 + 1/4 =
11.2/5 + 9/10 =
12.4/10 + 1/3 =

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

Answer key — Add Fractions — Unlike Denominators

Set 1. Prints on its own sheet.

  1. 1.11/12
  2. 2.7/6
  3. 3.11/30
  4. 4.14/15
  5. 5.7/6
  6. 6.4/3
  7. 7.23/20
  8. 8.9/10
  9. 9.1/1
  10. 10.13/12
  11. 11.13/10
  12. 12.11/15

Questions about Add Fractions — Unlike Denominators

What does the Add Fractions — Unlike Denominators worksheet cover?

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

Which Common Core standard does Add Fractions — Unlike Denominators practise?

CCSS.MATH.CONTENT.5.NF.A.1 — 5.NF.A.1, in the Number & Operations — Fractions domain 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?

Add Fractions — 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 pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does Add Fractions — 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 Add Fractions — Unlike Denominators can I print?

25 — one per pupil, 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 Add Fractions — Unlike Denominators free to print and photocopy?

Yes. Add Fractions — 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.

Is there a lesson plan to teach 5.NF.A.1?

Yes — “Adding Fractions with Unlike Denominators” is a 50-minute Grade 5 plan for 5.NF.A.1, timed section by section, with the misconceptions to expect and an exit ticket. Add Fractions — Unlike Denominators is the practice that follows it.

More practice for 5.NF.A.1

Add and subtract fractions with different denominators.

Teaching this next? Adding Fractions with Unlike Denominators is the 50-minute plan for it, with the misconceptions to expect.

All Grade 5 worksheets

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