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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 420 · 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. 1.324 − 282 =
  2. 2.104 − 88 =
  3. 3.1011 − 994 =
  4. 4.301 − 297 =
  5. 5.1007 − 995 =
  6. 6.230 − 193 =
  7. 7.106 − 75 =
  8. 8.506 − 484 =
  9. 9.225 − 175 =
  10. 10.67 − 33 =
  11. 11.108 − 86 =
  12. 12.329 − 286 =
  13. 13.218 − 183 =
  14. 14.1030 − 997 =
  15. 15.105 − 90 =
  16. 16.515 − 488 =
  17. 17.518 − 478 =
  18. 18.58 − 41 =
  19. 19.203 − 198 =
  20. 20.125 − 97 =
  21. 21.520 − 475 =
  22. 22.129 − 90 =
  23. 23.502 − 480 =
  24. 24.1005 − 981 =
  25. 25.83 − 78 =
  26. 26.93 − 75 =
  27. 27.328 − 277 =
  28. 28.1021 − 980 =
  29. 29.502 − 496 =
  30. 30.223 − 193 =
  31. 31.315 − 296 =
  32. 32.209 − 185 =
  33. 33.325 − 291 =
  34. 34.56 − 31 =
  35. 35.1005 − 994 =
  36. 36.83 − 66 =
  37. 37.1007 − 994 =
  38. 38.222 − 189 =
  39. 39.1003 − 993 =
  40. 40.211 − 176 =

Answer key

  1. 42
  2. 16
  3. 17
  4. 4
  5. 12
  6. 37
  7. 31
  8. 22
  9. 50
  10. 34
  11. 22
  12. 43
  13. 35
  14. 33
  15. 15
  16. 27
  17. 40
  18. 17
  19. 5
  20. 28
  21. 45
  22. 39
  23. 22
  24. 24
  25. 5
  26. 18
  27. 51
  28. 41
  29. 6
  30. 30
  31. 19
  32. 24
  33. 34
  34. 25
  35. 11
  36. 17
  37. 13
  38. 33
  39. 10
  40. 35

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