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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 730 · 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. 1.90 − 66 =
  2. 2.53 − 40 =
  3. 3.1019 − 986 =
  4. 4.59 − 38 =
  5. 5.114 − 94 =
  6. 6.207 − 198 =
  7. 7.105 − 76 =
  8. 8.315 − 285 =
  9. 9.54 − 35 =
  10. 10.109 − 75 =
  11. 11.301 − 288 =
  12. 12.224 − 187 =
  13. 13.1013 − 985 =
  14. 14.113 − 92 =
  15. 15.115 − 87 =
  16. 16.305 − 276 =
  17. 17.55 − 44 =
  18. 18.201 − 189 =
  19. 19.515 − 477 =
  20. 20.1001 − 992 =
  21. 21.98 − 76 =
  22. 22.514 − 476 =
  23. 23.510 − 496 =
  24. 24.94 − 55 =
  25. 25.223 − 192 =
  26. 26.95 − 72 =
  27. 27.318 − 298 =
  28. 28.327 − 298 =
  29. 29.1012 − 978 =
  30. 30.106 − 98 =
  31. 31.105 − 66 =
  32. 32.64 − 37 =
  33. 33.1016 − 989 =
  34. 34.1004 − 996 =
  35. 35.1021 − 994 =
  36. 36.89 − 63 =
  37. 37.310 − 282 =
  38. 38.1005 − 978 =
  39. 39.74 − 36 =
  40. 40.56 − 39 =

Answer key

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

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