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Turn It Around — Adding to 10 is a free printable Grade 1 maths worksheet on commutativity within ten, shown as a pair, aligned to Common Core standard 1.OA.B.3. 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.

Turn It Around — Adding to 10

1.OA.B.3

NameDate

Fill in both blanks.

1.8 + 2 = ___ , so 2 + 8 = ___
2.2 + 4 = ___ , so 4 + 2 = ___
3.4 + 5 = ___ , so 5 + 4 = ___
4.5 + 3 = ___ , so 3 + 5 = ___
5.3 + 7 = ___ , so 7 + 3 = ___
6.2 + 5 = ___ , so 5 + 2 = ___
7.7 + 3 = ___ , so 3 + 7 = ___
8.6 + 8 = ___ , so 8 + 6 = ___
9.6 + 2 = ___ , so 2 + 6 = ___
10.4 + 8 = ___ , so 8 + 4 = ___
11.7 + 7 = ___ , so 7 + 7 = ___
12.5 + 5 = ___ , so 5 + 5 = ___

LessonPrint · 1.OA.B.3 · Set 1 · free to copy for classroom use

Answer key — Turn It Around — Adding to 10

Set 1. Prints on its own sheet.

  1. 1.10 and 10
  2. 2.6 and 6
  3. 3.9 and 9
  4. 4.8 and 8
  5. 5.10 and 10
  6. 6.7 and 7
  7. 7.10 and 10
  8. 8.14 and 14
  9. 9.8 and 8
  10. 10.12 and 12
  11. 11.14 and 14
  12. 12.10 and 10

Questions about Turn It Around — Adding to 10

What does the Turn It Around — Adding to 10 worksheet cover?

It practises commutativity within ten, shown as a pair — 12 questions for Grade 1, all on Common Core 1.OA.B.3: Use facts you know to work out ones you do not — like knowing 3+8 because you know 8+3. The instruction to pupils is “Fill in both blanks”, and the answer key follows on the next sheet.

Which Common Core standard does Turn It Around — Adding to 10 practise?

CCSS.MATH.CONTENT.1.OA.B.3 — 1.OA.B.3, in the Operations & Algebraic Thinking domain for Grade 1. The published standard reads: “Apply properties of operations as strategies to add and subtract.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Turn It Around — Adding to 10 is written for Grade 1, typically ages 6-7. It is one of the sheets on 1.OA.B.3, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does Turn It Around — Adding to 10 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 Turn It Around — Adding to 10 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 Turn It Around — Adding to 10 free to print and photocopy?

Yes. Turn It Around — Adding to 10, 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 1.OA.B.3?

Yes — “Using Known Facts to Add” is a 40-minute Grade 1 plan for 1.OA.B.3, timed section by section, with the misconceptions to expect and an exit ticket. Turn It Around — Adding to 10 is the practice that follows it.

More practice for 1.OA.B.3

Use facts you know to work out ones you do not — like knowing 3+8 because you know 8+3.

Teaching this next? Using Known Facts to Add is the 40-minute plan for it, with the misconceptions to expect.

All Grade 1 worksheets

Last reviewed 2026-09-05. Aligned to 1.OA.B.3 of the Common Core State Standards for mathematics.