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Grade 3 Missing numbers — Everyday practice

Missing-number equations show the relationship between operations. Work steadily and show a few steps for problems that need them.

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Grade 3 Missing numbers — Everyday practice

Name: ________________________   Date: ______________

20 questions

Directions: Name the unknown quantity and read both sides of the equation. Write your answer for each problem.

  1. 290 - ______ = 258
  2. ______ + 145 = 464
  3. 607 - ______ = 381
  4. 809 - ______ = 516
  5. 280 - ______ = 125
  6. 309 - ______ = 212
  7. ______ + 489 = 878
  8. 539 - ______ = 193
  9. 388 - ______ = 152
  10. 857 - ______ = 611
  11. 416 - ______ = 86
  12. 412 - ______ = 4
  13. 633 - ______ = 262
  14. 350 - ______ = 191
  15. 378 - ______ = 344
  16. ______ + 131 = 461
  17. 219 - ______ = 144
  18. ______ + 164 = 355
  19. 548 - ______ = 228
  20. ______ + 186 = 410

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Show answer key (for parents and teachers)
  1. 1. 32
  2. 2. 319
  3. 3. 226
  4. 4. 293
  5. 5. 155
  6. 6. 97
  7. 7. 389
  8. 8. 346
  9. 9. 236
  10. 10. 246
  11. 11. 330
  12. 12. 408
  13. 13. 371
  14. 14. 159
  15. 15. 34
  16. 16. 330
  17. 17. 75
  18. 18. 191
  19. 19. 320
  20. 20. 224

How to help with this skill

Third graders begin to use multiplication, division, fractions and measurement regularly. Discuss which operation fits the question.

  • Name the unknown quantity and read both sides of the equation.
  • Use the inverse operation to find it.
  • Substitute your result back into the original equation.

Try this: Try a balance-scale drawing to make the equality visible.

Choose a different level

Gentle practiceEveryday practiceStretch your thinking

More Grade 3 practice

AdditionSubtractionMultiplicationDivisionMixed operations

Supplementary math practice, not a full curriculum. Review answers with your learner.