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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 828 · 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. 1.67 − 38 =
  2. 2.214 − 185 =
  3. 3.104 − 74 =
  4. 4.113 − 75 =
  5. 5.1025 − 975 =
  6. 6.61 − 48 =
  7. 7.52 − 45 =
  8. 8.515 − 498 =
  9. 9.308 − 294 =
  10. 10.526 − 494 =
  11. 11.54 − 32 =
  12. 12.57 − 35 =
  13. 13.318 − 275 =
  14. 14.51 − 30 =
  15. 15.89 − 74 =
  16. 16.1012 − 989 =
  17. 17.1004 − 976 =
  18. 18.1016 − 987 =
  19. 19.81 − 63 =
  20. 20.518 − 489 =
  21. 21.100 − 70 =
  22. 22.305 − 276 =
  23. 23.315 − 291 =
  24. 24.107 − 77 =
  25. 25.1026 − 977 =
  26. 26.201 − 197 =
  27. 27.202 − 183 =
  28. 28.120 − 86 =
  29. 29.82 − 67 =
  30. 30.114 − 91 =
  31. 31.120 − 78 =
  32. 32.115 − 94 =
  33. 33.504 − 492 =
  34. 34.318 − 286 =
  35. 35.69 − 43 =
  36. 36.92 − 78 =
  37. 37.225 − 198 =
  38. 38.1026 − 976 =
  39. 39.88 − 78 =
  40. 40.79 − 34 =

Answer key

  1. 29
  2. 29
  3. 30
  4. 38
  5. 50
  6. 13
  7. 7
  8. 17
  9. 14
  10. 32
  11. 22
  12. 22
  13. 43
  14. 21
  15. 15
  16. 23
  17. 28
  18. 29
  19. 18
  20. 29
  21. 30
  22. 29
  23. 24
  24. 30
  25. 49
  26. 4
  27. 19
  28. 34
  29. 15
  30. 23
  31. 42
  32. 21
  33. 12
  34. 32
  35. 26
  36. 14
  37. 27
  38. 50
  39. 10
  40. 45

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