Adding three numbers worksheets

  • Level: Grade 1 – Grade 2
  • Free
  • Printable
  • Answer key included

Adding three numbers encourages students to look for pairs that are easy to combine first, such as 7 + 3 or 5 + 5. This is an early, concrete introduction to the associative and commutative properties.

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Adding three numbers worksheets
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Add all three numbers.

  1. 1.
    7 + 4 + 5 =
  2. 2.
    6 + 5 + 3 =
  3. 3.
    3 + 9 + 6 =
  4. 4.
    4 + 6 + 5 =
  5. 5.
    6 + 8 + 3 =
  6. 6.
    1 + 7 + 9 =
  7. 7.
    2 + 3 + 1 =
  8. 8.
    3 + 4 + 8 =
  9. 9.
    4 + 4 + 7 =
  10. 10.
    8 + 8 + 1 =
  11. 11.
    5 + 8 + 6 =
  12. 12.
    1 + 5 + 9 =
  13. 13.
    7 + 9 + 6 =
  14. 14.
    8 + 7 + 8 =
  15. 15.
    9 + 9 + 8 =
  16. 16.
    6 + 9 + 3 =
  17. 17.
    1 + 8 + 4 =
  18. 18.
    9 + 3 + 1 =
  19. 19.
    2 + 6 + 5 =
  20. 20.
    5 + 8 + 3 =
  21. 21.
    6 + 5 + 8 =
  22. 22.
    2 + 2 + 2 =
  23. 23.
    3 + 5 + 8 =
  24. 24.
    4 + 1 + 6 =
  25. 25.
    9 + 8 + 4 =
  26. 26.
    4 + 9 + 9 =
  27. 27.
    6 + 7 + 6 =
  28. 28.
    5 + 4 + 5 =
  29. 29.
    4 + 8 + 2 =
  30. 30.
    2 + 5 + 1 =
MathSheetLabWorksheet #779658
Adding three numbers worksheets Answer key
  1. 1.
    7 + 4 + 5 = 16
  2. 2.
    6 + 5 + 3 = 14
  3. 3.
    3 + 9 + 6 = 18
  4. 4.
    4 + 6 + 5 = 15
  5. 5.
    6 + 8 + 3 = 17
  6. 6.
    1 + 7 + 9 = 17
  7. 7.
    2 + 3 + 1 = 6
  8. 8.
    3 + 4 + 8 = 15
  9. 9.
    4 + 4 + 7 = 15
  10. 10.
    8 + 8 + 1 = 17
  11. 11.
    5 + 8 + 6 = 19
  12. 12.
    1 + 5 + 9 = 15
  13. 13.
    7 + 9 + 6 = 22
  14. 14.
    8 + 7 + 8 = 23
  15. 15.
    9 + 9 + 8 = 26
  16. 16.
    6 + 9 + 3 = 18
  17. 17.
    1 + 8 + 4 = 13
  18. 18.
    9 + 3 + 1 = 13
  19. 19.
    2 + 6 + 5 = 13
  20. 20.
    5 + 8 + 3 = 16
  21. 21.
    6 + 5 + 8 = 19
  22. 22.
    2 + 2 + 2 = 6
  23. 23.
    3 + 5 + 8 = 16
  24. 24.
    4 + 1 + 6 = 11
  25. 25.
    9 + 8 + 4 = 21
  26. 26.
    4 + 9 + 9 = 22
  27. 27.
    6 + 7 + 6 = 19
  28. 28.
    5 + 4 + 5 = 14
  29. 29.
    4 + 8 + 2 = 14
  30. 30.
    2 + 5 + 1 = 8
MathSheetLabWorksheet #779658

About this worksheet

All addends are between 1 and 9, so totals stay below 28.

Each sheet contains 15, 21 or 30 problems (your choice) and is generated at random. Press “New problems” as many times as you like; there is no limit and no account needed.

Worked example

5 + 7 + 4 =
  1. Add two numbers first: 5 + 7 = 12.
  2. Then add the last one: 12 + 4 = 16.

Answer: 16

Teaching tips

  • Ask students to circle the two numbers they add first.
  • Discuss why the order does not change the total.

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