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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 10 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. 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? 379 + 368 = 637
2.True or false? 661 + 185 = 846
3.True or false? 376 + 225 = 601
4.True or false? 482 − 115 = 367
5.True or false? 526 + 366 = 882
6.True or false? 935 − 383 = 652
7.True or false? 582 − 295 = 313
8.True or false? 159 + 347 = 506
9.True or false? 437 + 386 = 713
10.True or false? 441 + 388 = 829
11.True or false? 186 + 242 = 328
12.True or false? 535 − 484 = 51

LessonPrint · 3.NBT.A.2 · Set 10 · free to copy for classroom use

Answer key — Add and Subtract Within 1000

Set 10. Prints on its own sheet.

  1. 1.false — 747
  2. 2.true
  3. 3.true
  4. 4.true
  5. 5.false — 892
  6. 6.false — 552
  7. 7.false — 287
  8. 8.true
  9. 9.false — 823
  10. 10.true
  11. 11.false — 428
  12. 12.true

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