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Level 5 · Printable worksheet

Level 5: big friends

Every sum carries or borrows, so every one needs a big friend. Remember: adding, fix this rod first; taking away, borrow first.

How to do these: Big friends: the 10 complements

Name ____________________   Date ____________   Time taken ________

  1. 3 + 9 =
  2. 15 − 7 =
  3. 14 − 8 =
  4. 9 + 3 =
  5. 12 − 4 =
  6. 5 + 8 =
  7. 8 + 7 =
  8. 17 − 8 =
  9. 7 + 3 =
  10. 5 + 6 =
  11. 13 − 7 =
  12. 3 + 7 =
  13. 9 + 4 =
  14. 2 + 8 =
  15. 14 − 5 =
  16. 11 − 2 =
  17. 2 + 9 =
  18. 11 − 3 =
  19. 10 − 9 =
  20. 8 + 8 =
  21. 10 − 3 =
  22. 16 − 9 =
  23. 9 + 2 =
  24. 9 + 9 =
Show the answers
  1. 12
  2. 8
  3. 6
  4. 12
  5. 8
  6. 13
  7. 15
  8. 9
  9. 10
  10. 11
  11. 6
  12. 10
  13. 13
  14. 10
  15. 9
  16. 9
  17. 11
  18. 8
  19. 1
  20. 16
  21. 7
  22. 7
  23. 11
  24. 18

How to use this sheet

  • Work each sum on a soroban or the online abacus, clearing the board between sums.
  • Time the whole sheet, then try to beat it tomorrow. Accuracy first; speed follows.
  • Got one wrong? Do it again slowly and say each move out loud.

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