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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 210 · 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. 1.70 − 42 =
  2. 2.99 − 74 =
  3. 3.58 − 25 =
  4. 4.85 − 78 =
  5. 5.206 − 193 =
  6. 6.507 − 478 =
  7. 7.519 − 497 =
  8. 8.329 − 275 =
  9. 9.87 − 69 =
  10. 10.130 − 78 =
  11. 11.325 − 292 =
  12. 12.102 − 96 =
  13. 13.124 − 78 =
  14. 14.228 − 182 =
  15. 15.89 − 70 =
  16. 16.309 − 283 =
  17. 17.1002 − 995 =
  18. 18.1029 − 996 =
  19. 19.330 − 283 =
  20. 20.109 − 94 =
  21. 21.324 − 298 =
  22. 22.87 − 64 =
  23. 23.204 − 183 =
  24. 24.82 − 62 =
  25. 25.302 − 283 =
  26. 26.528 − 479 =
  27. 27.323 − 287 =
  28. 28.115 − 78 =
  29. 29.507 − 480 =
  30. 30.1010 − 989 =
  31. 31.112 − 85 =
  32. 32.124 − 97 =
  33. 33.209 − 176 =
  34. 34.105 − 80 =
  35. 35.103 − 95 =
  36. 36.88 − 64 =
  37. 37.98 − 78 =
  38. 38.303 − 285 =
  39. 39.217 − 198 =
  40. 40.100 − 61 =

Answer key

  1. 28
  2. 25
  3. 33
  4. 7
  5. 13
  6. 29
  7. 22
  8. 54
  9. 18
  10. 52
  11. 33
  12. 6
  13. 46
  14. 46
  15. 19
  16. 26
  17. 7
  18. 33
  19. 47
  20. 15
  21. 26
  22. 23
  23. 21
  24. 20
  25. 19
  26. 49
  27. 36
  28. 37
  29. 27
  30. 21
  31. 27
  32. 27
  33. 33
  34. 25
  35. 8
  36. 24
  37. 20
  38. 18
  39. 19
  40. 39

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