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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 180 · 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. 1.103 − 70 =
  2. 2.526 − 482 =
  3. 3.53 − 44 =
  4. 4.117 − 84 =
  5. 5.1011 − 982 =
  6. 6.1017 − 986 =
  7. 7.528 − 494 =
  8. 8.311 − 298 =
  9. 9.56 − 48 =
  10. 10.115 − 86 =
  11. 11.503 − 496 =
  12. 12.525 − 495 =
  13. 13.509 − 486 =
  14. 14.56 − 35 =
  15. 15.327 − 297 =
  16. 16.55 − 29 =
  17. 17.99 − 57 =
  18. 18.510 − 481 =
  19. 19.304 − 278 =
  20. 20.127 − 92 =
  21. 21.1014 − 981 =
  22. 22.58 − 43 =
  23. 23.504 − 490 =
  24. 24.1026 − 996 =
  25. 25.104 − 56 =
  26. 26.216 − 182 =
  27. 27.317 − 284 =
  28. 28.57 − 39 =
  29. 29.88 − 77 =
  30. 30.78 − 29 =
  31. 31.79 − 45 =
  32. 32.122 − 80 =
  33. 33.325 − 288 =
  34. 34.54 − 26 =
  35. 35.53 − 34 =
  36. 36.105 − 64 =
  37. 37.201 − 179 =
  38. 38.322 − 282 =
  39. 39.113 − 96 =
  40. 40.103 − 87 =

Answer key

  1. 33
  2. 44
  3. 9
  4. 33
  5. 29
  6. 31
  7. 34
  8. 13
  9. 8
  10. 29
  11. 7
  12. 30
  13. 23
  14. 21
  15. 30
  16. 26
  17. 42
  18. 29
  19. 26
  20. 35
  21. 33
  22. 15
  23. 14
  24. 30
  25. 48
  26. 34
  27. 33
  28. 18
  29. 11
  30. 49
  31. 34
  32. 42
  33. 37
  34. 28
  35. 19
  36. 41
  37. 22
  38. 40
  39. 17
  40. 16

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