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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 23 · 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. 1.51 − 30 =
  2. 2.1016 − 993 =
  3. 3.519 − 476 =
  4. 4.1008 − 984 =
  5. 5.1002 − 997 =
  6. 6.105 − 78 =
  7. 7.529 − 476 =
  8. 8.303 − 289 =
  9. 9.1011 − 996 =
  10. 10.63 − 33 =
  11. 11.84 − 67 =
  12. 12.210 − 195 =
  13. 13.219 − 190 =
  14. 14.207 − 181 =
  15. 15.101 − 75 =
  16. 16.94 − 74 =
  17. 17.83 − 77 =
  18. 18.507 − 493 =
  19. 19.515 − 497 =
  20. 20.301 − 278 =
  21. 21.1019 − 997 =
  22. 22.228 − 196 =
  23. 23.104 − 65 =
  24. 24.520 − 483 =
  25. 25.227 − 182 =
  26. 26.93 − 66 =
  27. 27.123 − 77 =
  28. 28.83 − 58 =
  29. 29.208 − 192 =
  30. 30.321 − 278 =
  31. 31.88 − 60 =
  32. 32.206 − 193 =
  33. 33.220 − 189 =
  34. 34.1023 − 995 =
  35. 35.110 − 95 =
  36. 36.107 − 91 =
  37. 37.64 − 26 =
  38. 38.81 − 66 =
  39. 39.127 − 76 =
  40. 40.126 − 86 =

Answer key

  1. 21
  2. 23
  3. 43
  4. 24
  5. 5
  6. 27
  7. 53
  8. 14
  9. 15
  10. 30
  11. 17
  12. 15
  13. 29
  14. 26
  15. 26
  16. 20
  17. 6
  18. 14
  19. 18
  20. 23
  21. 22
  22. 32
  23. 39
  24. 37
  25. 45
  26. 27
  27. 46
  28. 25
  29. 16
  30. 43
  31. 28
  32. 13
  33. 31
  34. 28
  35. 15
  36. 16
  37. 38
  38. 15
  39. 51
  40. 40

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