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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 645 · 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. 1.85 − 72 =
  2. 2.64 − 45 =
  3. 3.1021 − 982 =
  4. 4.51 − 31 =
  5. 5.229 − 187 =
  6. 6.327 − 276 =
  7. 7.115 − 93 =
  8. 8.67 − 34 =
  9. 9.89 − 76 =
  10. 10.212 − 196 =
  11. 11.319 − 294 =
  12. 12.51 − 29 =
  13. 13.201 − 198 =
  14. 14.101 − 68 =
  15. 15.516 − 478 =
  16. 16.1010 − 991 =
  17. 17.527 − 491 =
  18. 18.304 − 283 =
  19. 19.316 − 286 =
  20. 20.1008 − 998 =
  21. 21.225 − 185 =
  22. 22.505 − 490 =
  23. 23.506 − 477 =
  24. 24.118 − 92 =
  25. 25.1030 − 986 =
  26. 26.322 − 280 =
  27. 27.205 − 186 =
  28. 28.130 − 97 =
  29. 29.82 − 77 =
  30. 30.302 − 276 =
  31. 31.1016 − 992 =
  32. 32.309 − 288 =
  33. 33.62 − 45 =
  34. 34.516 − 480 =
  35. 35.92 − 70 =
  36. 36.1014 − 976 =
  37. 37.320 − 298 =
  38. 38.520 − 484 =
  39. 39.88 − 68 =
  40. 40.509 − 481 =

Answer key

  1. 13
  2. 19
  3. 39
  4. 20
  5. 42
  6. 51
  7. 22
  8. 33
  9. 13
  10. 16
  11. 25
  12. 22
  13. 3
  14. 33
  15. 38
  16. 19
  17. 36
  18. 21
  19. 30
  20. 10
  21. 40
  22. 15
  23. 29
  24. 26
  25. 44
  26. 42
  27. 19
  28. 33
  29. 5
  30. 26
  31. 24
  32. 21
  33. 17
  34. 36
  35. 22
  36. 38
  37. 22
  38. 36
  39. 20
  40. 28

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