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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 78 · 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. 1.112 − 97 =
  2. 2.110 − 77 =
  3. 3.1013 − 975 =
  4. 4.1023 − 981 =
  5. 5.203 − 195 =
  6. 6.229 − 193 =
  7. 7.56 − 48 =
  8. 8.502 − 494 =
  9. 9.515 − 496 =
  10. 10.305 − 275 =
  11. 11.80 − 42 =
  12. 12.509 − 487 =
  13. 13.221 − 190 =
  14. 14.1025 − 995 =
  15. 15.524 − 478 =
  16. 16.105 − 81 =
  17. 17.524 − 484 =
  18. 18.116 − 83 =
  19. 19.53 − 25 =
  20. 20.205 − 182 =
  21. 21.105 − 66 =
  22. 22.504 − 477 =
  23. 23.86 − 77 =
  24. 24.327 − 293 =
  25. 25.521 − 486 =
  26. 26.97 − 64 =
  27. 27.96 − 62 =
  28. 28.97 − 59 =
  29. 29.505 − 477 =
  30. 30.75 − 40 =
  31. 31.104 − 57 =
  32. 32.505 − 492 =
  33. 33.301 − 279 =
  34. 34.204 − 178 =
  35. 35.54 − 32 =
  36. 36.519 − 494 =
  37. 37.321 − 286 =
  38. 38.101 − 75 =
  39. 39.504 − 489 =
  40. 40.526 − 476 =

Answer key

  1. 15
  2. 33
  3. 38
  4. 42
  5. 8
  6. 36
  7. 8
  8. 8
  9. 19
  10. 30
  11. 38
  12. 22
  13. 31
  14. 30
  15. 46
  16. 24
  17. 40
  18. 33
  19. 28
  20. 23
  21. 39
  22. 27
  23. 9
  24. 34
  25. 35
  26. 33
  27. 34
  28. 38
  29. 28
  30. 35
  31. 47
  32. 13
  33. 22
  34. 26
  35. 22
  36. 25
  37. 35
  38. 26
  39. 15
  40. 50

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