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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 450 · 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. 1.89 − 72 =
  2. 2.502 − 483 =
  3. 3.107 − 77 =
  4. 4.1005 − 997 =
  5. 5.95 − 61 =
  6. 6.90 − 75 =
  7. 7.114 − 98 =
  8. 8.71 − 46 =
  9. 9.227 − 194 =
  10. 10.127 − 81 =
  11. 11.96 − 68 =
  12. 12.107 − 98 =
  13. 13.515 − 485 =
  14. 14.125 − 96 =
  15. 15.67 − 46 =
  16. 16.220 − 180 =
  17. 17.105 − 61 =
  18. 18.121 − 92 =
  19. 19.54 − 27 =
  20. 20.320 − 294 =
  21. 21.83 − 75 =
  22. 22.530 − 496 =
  23. 23.307 − 286 =
  24. 24.125 − 87 =
  25. 25.80 − 46 =
  26. 26.321 − 285 =
  27. 27.1013 − 995 =
  28. 28.319 − 282 =
  29. 29.124 − 77 =
  30. 30.517 − 489 =
  31. 31.86 − 58 =
  32. 32.101 − 74 =
  33. 33.325 − 277 =
  34. 34.76 − 44 =
  35. 35.1013 − 984 =
  36. 36.127 − 86 =
  37. 37.1020 − 996 =
  38. 38.505 − 485 =
  39. 39.210 − 183 =
  40. 40.72 − 43 =

Answer key

  1. 17
  2. 19
  3. 30
  4. 8
  5. 34
  6. 15
  7. 16
  8. 25
  9. 33
  10. 46
  11. 28
  12. 9
  13. 30
  14. 29
  15. 21
  16. 40
  17. 44
  18. 29
  19. 27
  20. 26
  21. 8
  22. 34
  23. 21
  24. 38
  25. 34
  26. 36
  27. 18
  28. 37
  29. 47
  30. 28
  31. 28
  32. 27
  33. 48
  34. 32
  35. 29
  36. 41
  37. 24
  38. 20
  39. 27
  40. 29

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