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Add and Subtract Within 1000 is a free printable Grade 3 math worksheet on judging sums and differences rather than producing them, aligned to Common Core standard 3.NBT.A.2. 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.

Add and Subtract Within 1000

3.NBT.A.2

NameDate

Write true or false. If false, write the right answer.

1.True or false? 317 + 458 = 765
2.True or false? 416 − 145 = 331
3.True or false? 952 − 159 = 807
4.True or false? 139 + 448 = 587
5.True or false? 471 + 156 = 627
6.True or false? 135 + 439 = 564
7.True or false? 289 + 305 = 584
8.True or false? 685 + 238 = 813
9.True or false? 544 + 418 = 962
10.True or false? 459 + 193 = 652
11.True or false? 836 − 249 = 587
12.True or false? 834 − 142 = 692

LessonPrint · 3.NBT.A.2 · Set 1 · free to copy for classroom use

Answer key — Add and Subtract Within 1000

Set 1. Prints on its own sheet.

  1. 1.false — 775
  2. 2.false — 271
  3. 3.false — 793
  4. 4.true
  5. 5.true
  6. 6.false — 574
  7. 7.false — 594
  8. 8.false — 923
  9. 9.true
  10. 10.true
  11. 11.true
  12. 12.true

Questions about Add and Subtract Within 1000

What does the Add and Subtract Within 1000 worksheet cover?

It practices judging sums and differences rather than producing them — 12 questions for Grade 3, all on Common Core 3.NBT.A.2: Add and subtract within 1000 confidently. The instruction to students is “Write true or false. If false, write the right answer”, and the answer key follows on the next sheet.

Which Common Core standard does Add and Subtract Within 1000 practice?

CCSS.MATH.CONTENT.3.NBT.A.2 — 3.NBT.A.2, under Number & Operations in Base Ten for Grade 3. The published standard reads: “Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Add and Subtract Within 1000 is written for Grade 3, typically ages 8-9. It is one of the sheets on 3.NBT.A.2, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.

Does Add and Subtract Within 1000 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 and Subtract Within 1000 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 Add and Subtract Within 1000 free to print and photocopy?

Yes. Add and Subtract Within 1000, 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 3.NBT.A.2

Add and subtract within 1000 confidently.

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Last reviewed 2026-09-05. Aligned to 3.NBT.A.2 of the Common Core State Standards for Mathematics.