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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 807 · 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. 1.68 − 34 =
  2. 2.102 − 55 =
  3. 3.1025 − 995 =
  4. 4.223 − 186 =
  5. 5.120 − 85 =
  6. 6.1005 − 990 =
  7. 7.225 − 186 =
  8. 8.1006 − 977 =
  9. 9.510 − 481 =
  10. 10.94 − 56 =
  11. 11.529 − 496 =
  12. 12.321 − 283 =
  13. 13.61 − 28 =
  14. 14.65 − 47 =
  15. 15.102 − 88 =
  16. 16.86 − 72 =
  17. 17.119 − 86 =
  18. 18.109 − 62 =
  19. 19.205 − 194 =
  20. 20.1007 − 985 =
  21. 21.313 − 275 =
  22. 22.519 − 484 =
  23. 23.330 − 280 =
  24. 24.516 − 489 =
  25. 25.63 − 36 =
  26. 26.54 − 34 =
  27. 27.1021 − 994 =
  28. 28.117 − 82 =
  29. 29.112 − 82 =
  30. 30.82 − 69 =
  31. 31.64 − 31 =
  32. 32.89 − 59 =
  33. 33.73 − 38 =
  34. 34.508 − 475 =
  35. 35.97 − 70 =
  36. 36.210 − 195 =
  37. 37.56 − 46 =
  38. 38.106 − 83 =
  39. 39.212 − 196 =
  40. 40.307 − 298 =

Answer key

  1. 34
  2. 47
  3. 30
  4. 37
  5. 35
  6. 15
  7. 39
  8. 29
  9. 29
  10. 38
  11. 33
  12. 38
  13. 33
  14. 18
  15. 14
  16. 14
  17. 33
  18. 47
  19. 11
  20. 22
  21. 38
  22. 35
  23. 50
  24. 27
  25. 27
  26. 20
  27. 27
  28. 35
  29. 30
  30. 13
  31. 33
  32. 30
  33. 35
  34. 33
  35. 27
  36. 15
  37. 10
  38. 23
  39. 16
  40. 9

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