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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 361 · 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. 1.107 − 87 =
  2. 2.1023 − 978 =
  3. 3.321 − 293 =
  4. 4.92 − 72 =
  5. 5.53 − 47 =
  6. 6.204 − 192 =
  7. 7.320 − 293 =
  8. 8.1004 − 975 =
  9. 9.58 − 43 =
  10. 10.311 − 278 =
  11. 11.1017 − 994 =
  12. 12.96 − 67 =
  13. 13.318 − 275 =
  14. 14.329 − 286 =
  15. 15.109 − 67 =
  16. 16.57 − 46 =
  17. 17.91 − 56 =
  18. 18.204 − 185 =
  19. 19.81 − 77 =
  20. 20.501 − 495 =
  21. 21.220 − 182 =
  22. 22.104 − 61 =
  23. 23.317 − 277 =
  24. 24.302 − 291 =
  25. 25.1014 − 977 =
  26. 26.73 − 38 =
  27. 27.305 − 293 =
  28. 28.96 − 75 =
  29. 29.83 − 71 =
  30. 30.129 − 80 =
  31. 31.89 − 71 =
  32. 32.1024 − 985 =
  33. 33.69 − 39 =
  34. 34.327 − 293 =
  35. 35.102 − 69 =
  36. 36.101 − 59 =
  37. 37.1019 − 982 =
  38. 38.1025 − 996 =
  39. 39.87 − 60 =
  40. 40.59 − 29 =

Answer key

  1. 20
  2. 45
  3. 28
  4. 20
  5. 6
  6. 12
  7. 27
  8. 29
  9. 15
  10. 33
  11. 23
  12. 29
  13. 43
  14. 43
  15. 42
  16. 11
  17. 35
  18. 19
  19. 4
  20. 6
  21. 38
  22. 43
  23. 40
  24. 11
  25. 37
  26. 35
  27. 12
  28. 21
  29. 12
  30. 49
  31. 18
  32. 39
  33. 30
  34. 34
  35. 33
  36. 42
  37. 37
  38. 29
  39. 27
  40. 30

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