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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 518 · 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. 1.101 − 70 =
  2. 2.207 − 188 =
  3. 3.76 − 29 =
  4. 4.303 − 285 =
  5. 5.501 − 497 =
  6. 6.229 − 190 =
  7. 7.330 − 284 =
  8. 8.526 − 480 =
  9. 9.114 − 92 =
  10. 10.101 − 64 =
  11. 11.508 − 485 =
  12. 12.525 − 496 =
  13. 13.52 − 32 =
  14. 14.114 − 85 =
  15. 15.57 − 25 =
  16. 16.522 − 498 =
  17. 17.315 − 276 =
  18. 18.84 − 70 =
  19. 19.224 − 178 =
  20. 20.512 − 476 =
  21. 21.54 − 40 =
  22. 22.227 − 185 =
  23. 23.314 − 279 =
  24. 24.1025 − 998 =
  25. 25.206 − 184 =
  26. 26.503 − 488 =
  27. 27.509 − 478 =
  28. 28.106 − 81 =
  29. 29.54 − 42 =
  30. 30.515 − 492 =
  31. 31.203 − 180 =
  32. 32.71 − 43 =
  33. 33.81 − 63 =
  34. 34.87 − 68 =
  35. 35.109 − 86 =
  36. 36.106 − 88 =
  37. 37.60 − 32 =
  38. 38.113 − 78 =
  39. 39.107 − 89 =
  40. 40.111 − 81 =

Answer key

  1. 31
  2. 19
  3. 47
  4. 18
  5. 4
  6. 39
  7. 46
  8. 46
  9. 22
  10. 37
  11. 23
  12. 29
  13. 20
  14. 29
  15. 32
  16. 24
  17. 39
  18. 14
  19. 46
  20. 36
  21. 14
  22. 42
  23. 35
  24. 27
  25. 22
  26. 15
  27. 31
  28. 25
  29. 12
  30. 23
  31. 23
  32. 28
  33. 18
  34. 19
  35. 23
  36. 18
  37. 28
  38. 35
  39. 18
  40. 30

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