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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 915 · 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. 1.103 − 89 =
  2. 2.103 − 75 =
  3. 3.525 − 487 =
  4. 4.209 − 196 =
  5. 5.116 − 85 =
  6. 6.1024 − 979 =
  7. 7.1021 − 979 =
  8. 8.226 − 185 =
  9. 9.301 − 297 =
  10. 10.505 − 487 =
  11. 11.107 − 95 =
  12. 12.85 − 70 =
  13. 13.508 − 481 =
  14. 14.1005 − 986 =
  15. 15.95 − 69 =
  16. 16.207 − 198 =
  17. 17.77 − 47 =
  18. 18.93 − 78 =
  19. 19.309 − 284 =
  20. 20.81 − 56 =
  21. 21.109 − 76 =
  22. 22.514 − 477 =
  23. 23.92 − 56 =
  24. 24.88 − 71 =
  25. 25.505 − 496 =
  26. 26.53 − 46 =
  27. 27.52 − 48 =
  28. 28.102 − 67 =
  29. 29.216 − 182 =
  30. 30.118 − 81 =
  31. 31.321 − 277 =
  32. 32.324 − 276 =
  33. 33.309 − 290 =
  34. 34.112 − 85 =
  35. 35.312 − 277 =
  36. 36.509 − 488 =
  37. 37.97 − 68 =
  38. 38.326 − 284 =
  39. 39.52 − 29 =
  40. 40.76 − 39 =

Answer key

  1. 14
  2. 28
  3. 38
  4. 13
  5. 31
  6. 45
  7. 42
  8. 41
  9. 4
  10. 18
  11. 12
  12. 15
  13. 27
  14. 19
  15. 26
  16. 9
  17. 30
  18. 15
  19. 25
  20. 25
  21. 33
  22. 37
  23. 36
  24. 17
  25. 9
  26. 7
  27. 4
  28. 35
  29. 34
  30. 37
  31. 44
  32. 48
  33. 19
  34. 27
  35. 35
  36. 21
  37. 29
  38. 42
  39. 23
  40. 37

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