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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 602 · 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 − 78 =
  2. 2.209 − 178 =
  3. 3.82 − 65 =
  4. 4.90 − 67 =
  5. 5.324 − 297 =
  6. 6.508 − 477 =
  7. 7.103 − 94 =
  8. 8.524 − 489 =
  9. 9.72 − 41 =
  10. 10.229 − 178 =
  11. 11.522 − 477 =
  12. 12.94 − 63 =
  13. 13.89 − 66 =
  14. 14.1016 − 997 =
  15. 15.95 − 75 =
  16. 16.88 − 71 =
  17. 17.102 − 97 =
  18. 18.62 − 29 =
  19. 19.303 − 279 =
  20. 20.321 − 291 =
  21. 21.122 − 98 =
  22. 22.205 − 194 =
  23. 23.516 − 483 =
  24. 24.1030 − 976 =
  25. 25.67 − 43 =
  26. 26.101 − 86 =
  27. 27.307 − 288 =
  28. 28.83 − 70 =
  29. 29.319 − 295 =
  30. 30.101 − 66 =
  31. 31.206 − 188 =
  32. 32.91 − 73 =
  33. 33.107 − 76 =
  34. 34.78 − 25 =
  35. 35.220 − 182 =
  36. 36.117 − 80 =
  37. 37.523 − 480 =
  38. 38.218 − 188 =
  39. 39.211 − 197 =
  40. 40.1025 − 997 =

Answer key

  1. 27
  2. 31
  3. 17
  4. 23
  5. 27
  6. 31
  7. 9
  8. 35
  9. 31
  10. 51
  11. 45
  12. 31
  13. 23
  14. 19
  15. 20
  16. 17
  17. 5
  18. 33
  19. 24
  20. 30
  21. 24
  22. 11
  23. 33
  24. 54
  25. 24
  26. 15
  27. 19
  28. 13
  29. 24
  30. 35
  31. 18
  32. 18
  33. 31
  34. 53
  35. 38
  36. 37
  37. 43
  38. 30
  39. 14
  40. 28

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