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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 877 · 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. 1.508 − 489 =
  2. 2.1019 − 977 =
  3. 3.89 − 62 =
  4. 4.506 − 497 =
  5. 5.309 − 276 =
  6. 6.201 − 184 =
  7. 7.1018 − 986 =
  8. 8.309 − 286 =
  9. 9.122 − 76 =
  10. 10.109 − 94 =
  11. 11.103 − 71 =
  12. 12.89 − 70 =
  13. 13.81 − 77 =
  14. 14.94 − 75 =
  15. 15.1016 − 980 =
  16. 16.309 − 285 =
  17. 17.1001 − 979 =
  18. 18.113 − 83 =
  19. 19.109 − 91 =
  20. 20.1008 − 998 =
  21. 21.1004 − 997 =
  22. 22.530 − 483 =
  23. 23.122 − 88 =
  24. 24.309 − 275 =
  25. 25.98 − 78 =
  26. 26.1015 − 983 =
  27. 27.102 − 67 =
  28. 28.314 − 298 =
  29. 29.327 − 281 =
  30. 30.517 − 483 =
  31. 31.521 − 496 =
  32. 32.513 − 482 =
  33. 33.58 − 30 =
  34. 34.97 − 60 =
  35. 35.97 − 74 =
  36. 36.81 − 62 =
  37. 37.328 − 294 =
  38. 38.75 − 30 =
  39. 39.51 − 36 =
  40. 40.1009 − 989 =

Answer key

  1. 19
  2. 42
  3. 27
  4. 9
  5. 33
  6. 17
  7. 32
  8. 23
  9. 46
  10. 15
  11. 32
  12. 19
  13. 4
  14. 19
  15. 36
  16. 24
  17. 22
  18. 30
  19. 18
  20. 10
  21. 7
  22. 47
  23. 34
  24. 34
  25. 20
  26. 32
  27. 35
  28. 16
  29. 46
  30. 34
  31. 25
  32. 31
  33. 28
  34. 37
  35. 23
  36. 19
  37. 34
  38. 45
  39. 15
  40. 20

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