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Grade 1 Missing numbers — Stretch your thinking

Missing-number equations show the relationship between operations. Try the more demanding numbers. Estimate first, then explain your method and verify.

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Grade 1 Missing numbers — Stretch your thinking

Name: ________________________   Date: ______________

20 questions

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

  1. 11 - ______ = 2
  2. 24 - ______ = 13
  3. 23 - ______ = 15
  4. 18 - ______ = 15
  5. ______ + 5 = 17
  6. ______ + 1 = 11
  7. ______ + 12 = 17
  8. ______ + 6 = 11
  9. ______ + 5 = 14
  10. ______ + 1 = 12
  11. 11 - ______ = 4
  12. ______ + 14 = 17
  13. 7 - ______ = 5
  14. 15 - ______ = 12
  15. ______ + 14 = 18
  16. 20 - ______ = 13
  17. ______ + 1 = 4
  18. 13 - ______ = 5
  19. ______ + 1 = 7
  20. ______ + 3 = 7

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Show answer key (for parents and teachers)
  1. 1. 9
  2. 2. 11
  3. 3. 8
  4. 4. 3
  5. 5. 12
  6. 6. 10
  7. 7. 5
  8. 8. 5
  9. 9. 9
  10. 10. 11
  11. 11. 7
  12. 12. 3
  13. 13. 2
  14. 14. 3
  15. 15. 4
  16. 16. 7
  17. 17. 3
  18. 18. 8
  19. 19. 6
  20. 20. 4

How to help with this skill

First graders use drawings, objects, and number lines to understand small numbers and explain their thinking. Focus on accuracy before speed.

  • 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 1 practice

AdditionSubtractionNumber patternsPlace valueComparing numbers

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