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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 609 · 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. 1.1024 − 979 =
  2. 2.218 − 180 =
  3. 3.1015 − 997 =
  4. 4.523 − 497 =
  5. 5.1024 − 981 =
  6. 6.69 − 33 =
  7. 7.96 − 72 =
  8. 8.211 − 196 =
  9. 9.84 − 75 =
  10. 10.530 − 483 =
  11. 11.521 − 490 =
  12. 12.114 − 76 =
  13. 13.101 − 95 =
  14. 14.505 − 494 =
  15. 15.525 − 481 =
  16. 16.93 − 77 =
  17. 17.110 − 79 =
  18. 18.524 − 482 =
  19. 19.322 − 283 =
  20. 20.220 − 189 =
  21. 21.305 − 297 =
  22. 22.78 − 47 =
  23. 23.1018 − 987 =
  24. 24.89 − 65 =
  25. 25.206 − 179 =
  26. 26.55 − 35 =
  27. 27.501 − 484 =
  28. 28.315 − 286 =
  29. 29.323 − 281 =
  30. 30.1001 − 975 =
  31. 31.519 − 475 =
  32. 32.74 − 25 =
  33. 33.72 − 48 =
  34. 34.228 − 179 =
  35. 35.105 − 56 =
  36. 36.514 − 498 =
  37. 37.201 − 195 =
  38. 38.102 − 60 =
  39. 39.306 − 296 =
  40. 40.224 − 198 =

Answer key

  1. 45
  2. 38
  3. 18
  4. 26
  5. 43
  6. 36
  7. 24
  8. 15
  9. 9
  10. 47
  11. 31
  12. 38
  13. 6
  14. 11
  15. 44
  16. 16
  17. 31
  18. 42
  19. 39
  20. 31
  21. 8
  22. 31
  23. 31
  24. 24
  25. 27
  26. 20
  27. 17
  28. 29
  29. 42
  30. 26
  31. 44
  32. 49
  33. 24
  34. 49
  35. 49
  36. 16
  37. 6
  38. 42
  39. 10
  40. 26

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