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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 543 · 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. 1.83 − 73 =
  2. 2.81 − 78 =
  3. 3.314 − 291 =
  4. 4.115 − 82 =
  5. 5.108 − 81 =
  6. 6.202 − 196 =
  7. 7.204 − 189 =
  8. 8.305 − 278 =
  9. 9.201 − 191 =
  10. 10.525 − 490 =
  11. 11.90 − 66 =
  12. 12.110 − 65 =
  13. 13.524 − 476 =
  14. 14.69 − 28 =
  15. 15.520 − 481 =
  16. 16.96 − 59 =
  17. 17.1003 − 985 =
  18. 18.56 − 44 =
  19. 19.65 − 37 =
  20. 20.110 − 90 =
  21. 21.330 − 281 =
  22. 22.1005 − 995 =
  23. 23.101 − 55 =
  24. 24.501 − 485 =
  25. 25.521 − 487 =
  26. 26.56 − 27 =
  27. 27.102 − 68 =
  28. 28.107 − 63 =
  29. 29.1014 − 979 =
  30. 30.321 − 282 =
  31. 31.1016 − 984 =
  32. 32.302 − 276 =
  33. 33.510 − 487 =
  34. 34.1003 − 982 =
  35. 35.103 − 69 =
  36. 36.86 − 75 =
  37. 37.97 − 65 =
  38. 38.112 − 84 =
  39. 39.525 − 487 =
  40. 40.87 − 65 =

Answer key

  1. 10
  2. 3
  3. 23
  4. 33
  5. 27
  6. 6
  7. 15
  8. 27
  9. 10
  10. 35
  11. 24
  12. 45
  13. 48
  14. 41
  15. 39
  16. 37
  17. 18
  18. 12
  19. 28
  20. 20
  21. 49
  22. 10
  23. 46
  24. 16
  25. 34
  26. 29
  27. 34
  28. 44
  29. 35
  30. 39
  31. 32
  32. 26
  33. 23
  34. 21
  35. 34
  36. 11
  37. 32
  38. 28
  39. 38
  40. 22

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