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Add and Subtract Within 1000 is a free printable Grade 2 math worksheet on judging three-digit sums and differences, aligned to Common Core standard 2.NBT.B.7. 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 25 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

2.NBT.B.7

NameDate

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

1.True or false? 351 − 78 = 327
2.True or false? 809 − 74 = 875
3.True or false? 213 − 50 = 163
4.True or false? 792 + 72 = 764
5.True or false? 328 + 32 = 360
6.True or false? 525 − 17 = 512
7.True or false? 188 + 90 = 278
8.True or false? 374 − 58 = 316
9.True or false? 672 + 51 = 623
10.True or false? 348 + 23 = 371
11.True or false? 595 + 59 = 654
12.True or false? 645 + 60 = 605

LessonPrint · 2.NBT.B.7 · Set 25 · free to copy for classroom use

Answer key — Add and Subtract Within 1000

Set 25. Prints on its own sheet.

  1. 1.false — 273
  2. 2.false — 735
  3. 3.true
  4. 4.false — 864
  5. 5.true
  6. 6.false — 508
  7. 7.true
  8. 8.true
  9. 9.false — 723
  10. 10.true
  11. 11.true
  12. 12.false — 705

Last reviewed 2026-09-05. Aligned to 2.NBT.B.7 of the Common Core State Standards for Mathematics.