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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 666 · 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. 1.1026 − 985 =
  2. 2.1008 − 975 =
  3. 3.122 − 80 =
  4. 4.108 − 77 =
  5. 5.1018 − 993 =
  6. 6.1018 − 976 =
  7. 7.82 − 75 =
  8. 8.223 − 190 =
  9. 9.92 − 74 =
  10. 10.508 − 491 =
  11. 11.206 − 175 =
  12. 12.105 − 70 =
  13. 13.505 − 485 =
  14. 14.118 − 93 =
  15. 15.127 − 78 =
  16. 16.509 − 493 =
  17. 17.1020 − 990 =
  18. 18.217 − 197 =
  19. 19.309 − 277 =
  20. 20.322 − 290 =
  21. 21.69 − 33 =
  22. 22.1006 − 987 =
  23. 23.67 − 27 =
  24. 24.226 − 184 =
  25. 25.529 − 488 =
  26. 26.1016 − 978 =
  27. 27.224 − 194 =
  28. 28.109 − 91 =
  29. 29.87 − 64 =
  30. 30.308 − 294 =
  31. 31.103 − 69 =
  32. 32.522 − 484 =
  33. 33.85 − 65 =
  34. 34.109 − 75 =
  35. 35.73 − 46 =
  36. 36.1016 − 998 =
  37. 37.87 − 60 =
  38. 38.70 − 43 =
  39. 39.1005 − 996 =
  40. 40.85 − 74 =

Answer key

  1. 41
  2. 33
  3. 42
  4. 31
  5. 25
  6. 42
  7. 7
  8. 33
  9. 18
  10. 17
  11. 31
  12. 35
  13. 20
  14. 25
  15. 49
  16. 16
  17. 30
  18. 20
  19. 32
  20. 32
  21. 36
  22. 19
  23. 40
  24. 42
  25. 41
  26. 38
  27. 30
  28. 18
  29. 23
  30. 14
  31. 34
  32. 38
  33. 20
  34. 34
  35. 27
  36. 18
  37. 27
  38. 27
  39. 9
  40. 11

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