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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 13 · 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. 1.66 − 27 =
  2. 2.105 − 92 =
  3. 3.225 − 187 =
  4. 4.1014 − 989 =
  5. 5.105 − 96 =
  6. 6.83 − 68 =
  7. 7.61 − 46 =
  8. 8.108 − 82 =
  9. 9.515 − 492 =
  10. 10.316 − 283 =
  11. 11.86 − 59 =
  12. 12.1016 − 985 =
  13. 13.521 − 476 =
  14. 14.512 − 494 =
  15. 15.95 − 64 =
  16. 16.54 − 47 =
  17. 17.512 − 480 =
  18. 18.1019 − 998 =
  19. 19.1003 − 994 =
  20. 20.227 − 189 =
  21. 21.516 − 492 =
  22. 22.76 − 28 =
  23. 23.502 − 491 =
  24. 24.1012 − 993 =
  25. 25.305 − 278 =
  26. 26.69 − 45 =
  27. 27.107 − 69 =
  28. 28.224 − 192 =
  29. 29.129 − 90 =
  30. 30.302 − 280 =
  31. 31.514 − 483 =
  32. 32.501 − 496 =
  33. 33.229 − 183 =
  34. 34.92 − 74 =
  35. 35.65 − 40 =
  36. 36.110 − 82 =
  37. 37.115 − 89 =
  38. 38.220 − 185 =
  39. 39.502 − 480 =
  40. 40.103 − 68 =

Answer key

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

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