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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 51 · 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. 1.304 − 298 =
  2. 2.306 − 296 =
  3. 3.229 − 198 =
  4. 4.80 − 34 =
  5. 5.313 − 288 =
  6. 6.317 − 294 =
  7. 7.1003 − 992 =
  8. 8.218 − 198 =
  9. 9.98 − 76 =
  10. 10.127 − 86 =
  11. 11.203 − 196 =
  12. 12.1012 − 993 =
  13. 13.209 − 196 =
  14. 14.85 − 59 =
  15. 15.516 − 496 =
  16. 16.105 − 97 =
  17. 17.56 − 29 =
  18. 18.524 − 477 =
  19. 19.83 − 57 =
  20. 20.88 − 72 =
  21. 21.1020 − 976 =
  22. 22.1018 − 989 =
  23. 23.225 − 195 =
  24. 24.519 − 490 =
  25. 25.227 − 175 =
  26. 26.99 − 71 =
  27. 27.507 − 476 =
  28. 28.83 − 59 =
  29. 29.106 − 76 =
  30. 30.56 − 34 =
  31. 31.1016 − 983 =
  32. 32.90 − 66 =
  33. 33.312 − 293 =
  34. 34.67 − 28 =
  35. 35.107 − 92 =
  36. 36.330 − 286 =
  37. 37.96 − 56 =
  38. 38.97 − 77 =
  39. 39.526 − 475 =
  40. 40.107 − 86 =

Answer key

  1. 6
  2. 10
  3. 31
  4. 46
  5. 25
  6. 23
  7. 11
  8. 20
  9. 22
  10. 41
  11. 7
  12. 19
  13. 13
  14. 26
  15. 20
  16. 8
  17. 27
  18. 47
  19. 26
  20. 16
  21. 44
  22. 29
  23. 30
  24. 29
  25. 52
  26. 28
  27. 31
  28. 24
  29. 30
  30. 22
  31. 33
  32. 24
  33. 19
  34. 39
  35. 15
  36. 44
  37. 40
  38. 20
  39. 51
  40. 21

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