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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 479 · 40 questions
TalentJR

How to do it in your head (Count up): Start at the smaller number. Jump to the next ten, then the next hundred, then to the bigger number. Add up all the jumps.

NameDateTime takenScore ___ / 40
  1. 1.82 − 64 =
  2. 2.1021 − 979 =
  3. 3.97 − 70 =
  4. 4.109 − 72 =
  5. 5.529 − 496 =
  6. 6.85 − 62 =
  7. 7.223 − 187 =
  8. 8.81 − 68 =
  9. 9.54 − 47 =
  10. 10.1018 − 989 =
  11. 11.510 − 488 =
  12. 12.109 − 81 =
  13. 13.68 − 41 =
  14. 14.1005 − 990 =
  15. 15.109 − 77 =
  16. 16.108 − 61 =
  17. 17.106 − 69 =
  18. 18.115 − 83 =
  19. 19.524 − 475 =
  20. 20.313 − 286 =
  21. 21.54 − 31 =
  22. 22.102 − 76 =
  23. 23.1013 − 982 =
  24. 24.224 − 191 =
  25. 25.205 − 198 =
  26. 26.94 − 56 =
  27. 27.226 − 189 =
  28. 28.1028 − 981 =
  29. 29.92 − 56 =
  30. 30.113 − 88 =
  31. 31.509 − 492 =
  32. 32.1008 − 983 =
  33. 33.83 − 72 =
  34. 34.1017 − 989 =
  35. 35.71 − 32 =
  36. 36.322 − 281 =
  37. 37.318 − 284 =
  38. 38.1009 − 997 =
  39. 39.515 − 486 =
  40. 40.122 − 96 =

Answer key

  1. 18
  2. 42
  3. 27
  4. 37
  5. 33
  6. 23
  7. 36
  8. 13
  9. 7
  10. 29
  11. 22
  12. 28
  13. 27
  14. 15
  15. 32
  16. 47
  17. 37
  18. 32
  19. 49
  20. 27
  21. 23
  22. 26
  23. 31
  24. 33
  25. 7
  26. 38
  27. 37
  28. 47
  29. 36
  30. 25
  31. 17
  32. 25
  33. 11
  34. 28
  35. 39
  36. 41
  37. 34
  38. 12
  39. 29
  40. 26

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