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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 515 · 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. 1.105 − 67 =
  2. 2.307 − 286 =
  3. 3.204 − 196 =
  4. 4.516 − 493 =
  5. 5.101 − 71 =
  6. 6.510 − 476 =
  7. 7.83 − 58 =
  8. 8.1025 − 996 =
  9. 9.84 − 69 =
  10. 10.503 − 475 =
  11. 11.105 − 77 =
  12. 12.86 − 65 =
  13. 13.75 − 46 =
  14. 14.126 − 76 =
  15. 15.81 − 64 =
  16. 16.74 − 32 =
  17. 17.308 − 288 =
  18. 18.304 − 283 =
  19. 19.506 − 494 =
  20. 20.1006 − 981 =
  21. 21.519 − 486 =
  22. 22.1014 − 985 =
  23. 23.109 − 57 =
  24. 24.502 − 482 =
  25. 25.206 − 176 =
  26. 26.1015 − 985 =
  27. 27.109 − 67 =
  28. 28.504 − 494 =
  29. 29.106 − 79 =
  30. 30.130 − 75 =
  31. 31.81 − 63 =
  32. 32.78 − 48 =
  33. 33.305 − 289 =
  34. 34.503 − 498 =
  35. 35.101 − 80 =
  36. 36.1006 − 992 =
  37. 37.1029 − 981 =
  38. 38.503 − 488 =
  39. 39.72 − 29 =
  40. 40.56 − 33 =

Answer key

  1. 38
  2. 21
  3. 8
  4. 23
  5. 30
  6. 34
  7. 25
  8. 29
  9. 15
  10. 28
  11. 28
  12. 21
  13. 29
  14. 50
  15. 17
  16. 42
  17. 20
  18. 21
  19. 12
  20. 25
  21. 33
  22. 29
  23. 52
  24. 20
  25. 30
  26. 30
  27. 42
  28. 10
  29. 27
  30. 55
  31. 18
  32. 30
  33. 16
  34. 5
  35. 21
  36. 14
  37. 48
  38. 15
  39. 43
  40. 23

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