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True or False Number Sentences is a free printable Grade 1 math worksheet on judging an equation rather than solving it, aligned to Common Core standard 1.OA.D.8. 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.

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All 25 sets ask different questions.

True or False Number Sentences

1.OA.D.8

NameDate

Write true or false.

1.True or false? 6 + 2 = 7
2.True or false? 1 + 6 = 8
3.True or false? 1 + 6 = 5 + 2
4.True or false? 4 + 4 = 7
5.True or false? 12 − 2 = 9 + 1
6.True or false? 6 − 1 = 1 + 4
7.True or false? 7 + 2 = 9
8.True or false? 6 + 1 = 6
9.True or false? 3 + 6 = 8
10.True or false? 2 + 2 = 2 + 3
11.True or false? 9 − 2 = 6 + 1
12.True or false? 14 − 6 = 6 + 2

LessonPrint · 1.OA.D.8 · Set 1 · free to copy for classroom use

Answer key — True or False Number Sentences

Set 1. Prints on its own sheet.

  1. 1.false
  2. 2.false
  3. 3.true
  4. 4.false
  5. 5.true
  6. 6.true
  7. 7.true
  8. 8.false
  9. 9.false
  10. 10.false
  11. 11.true
  12. 12.true

Questions about True or False Number Sentences

What does the True or False Number Sentences worksheet cover?

It practices judging an equation rather than solving it — 12 questions for Grade 1, all on Common Core 1.OA.D.8: Find the missing number in a number sentence. The instruction to students is “Write true or false”, and the answer key follows on the next sheet.

Which Common Core standard does True or False Number Sentences practice?

CCSS.MATH.CONTENT.1.OA.D.8 — 1.OA.D.8, under Operations & Algebraic Thinking for Grade 1. The published standard reads: “Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

True or False Number Sentences is written for Grade 1, typically ages 6-7. It is one of the sheets on 1.OA.D.8, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.

Does True or False Number Sentences 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 True or False Number Sentences 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 True or False Number Sentences free to print and photocopy?

Yes. True or False Number Sentences, 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 1.OA.D.8

Find the missing number in a number sentence.

All Grade 1 worksheets

Last reviewed 2026-09-05. Aligned to 1.OA.D.8 of the Common Core State Standards for Mathematics.