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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 38 · 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. 1.61 − 28 =
  2. 2.94 − 77 =
  3. 3.57 − 36 =
  4. 4.521 − 492 =
  5. 5.229 − 184 =
  6. 6.102 − 92 =
  7. 7.95 − 64 =
  8. 8.219 − 186 =
  9. 9.57 − 41 =
  10. 10.108 − 86 =
  11. 11.527 − 484 =
  12. 12.85 − 76 =
  13. 13.52 − 39 =
  14. 14.203 − 181 =
  15. 15.305 − 293 =
  16. 16.203 − 179 =
  17. 17.121 − 80 =
  18. 18.315 − 277 =
  19. 19.330 − 290 =
  20. 20.316 − 295 =
  21. 21.310 − 295 =
  22. 22.63 − 34 =
  23. 23.501 − 482 =
  24. 24.119 − 91 =
  25. 25.107 − 70 =
  26. 26.227 − 181 =
  27. 27.210 − 183 =
  28. 28.119 − 96 =
  29. 29.506 − 491 =
  30. 30.116 − 90 =
  31. 31.106 − 83 =
  32. 32.60 − 35 =
  33. 33.124 − 76 =
  34. 34.518 − 485 =
  35. 35.1007 − 979 =
  36. 36.212 − 196 =
  37. 37.516 − 475 =
  38. 38.1004 − 978 =
  39. 39.501 − 483 =
  40. 40.123 − 92 =

Answer key

  1. 33
  2. 17
  3. 21
  4. 29
  5. 45
  6. 10
  7. 31
  8. 33
  9. 16
  10. 22
  11. 43
  12. 9
  13. 13
  14. 22
  15. 12
  16. 24
  17. 41
  18. 38
  19. 40
  20. 21
  21. 15
  22. 29
  23. 19
  24. 28
  25. 37
  26. 46
  27. 27
  28. 23
  29. 15
  30. 26
  31. 23
  32. 25
  33. 48
  34. 33
  35. 28
  36. 16
  37. 41
  38. 26
  39. 18
  40. 31

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