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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 10 · 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. 1.313 − 278 =
  2. 2.527 − 486 =
  3. 3.51 − 48 =
  4. 4.309 − 278 =
  5. 5.328 − 288 =
  6. 6.504 − 478 =
  7. 7.218 − 184 =
  8. 8.314 − 295 =
  9. 9.71 − 38 =
  10. 10.105 − 66 =
  11. 11.76 − 48 =
  12. 12.68 − 43 =
  13. 13.112 − 85 =
  14. 14.59 − 47 =
  15. 15.55 − 44 =
  16. 16.77 − 45 =
  17. 17.118 − 75 =
  18. 18.129 − 77 =
  19. 19.1009 − 997 =
  20. 20.1013 − 998 =
  21. 21.325 − 285 =
  22. 22.1015 − 982 =
  23. 23.204 − 184 =
  24. 24.52 − 31 =
  25. 25.321 − 281 =
  26. 26.229 − 193 =
  27. 27.210 − 190 =
  28. 28.225 − 176 =
  29. 29.60 − 46 =
  30. 30.328 − 296 =
  31. 31.82 − 72 =
  32. 32.58 − 30 =
  33. 33.126 − 86 =
  34. 34.101 − 75 =
  35. 35.59 − 45 =
  36. 36.1021 − 978 =
  37. 37.60 − 45 =
  38. 38.314 − 276 =
  39. 39.90 − 69 =
  40. 40.301 − 293 =

Answer key

  1. 35
  2. 41
  3. 3
  4. 31
  5. 40
  6. 26
  7. 34
  8. 19
  9. 33
  10. 39
  11. 28
  12. 25
  13. 27
  14. 12
  15. 11
  16. 32
  17. 43
  18. 52
  19. 12
  20. 15
  21. 40
  22. 33
  23. 20
  24. 21
  25. 40
  26. 36
  27. 20
  28. 49
  29. 14
  30. 32
  31. 10
  32. 28
  33. 40
  34. 26
  35. 14
  36. 43
  37. 15
  38. 38
  39. 21
  40. 8

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