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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 493 · 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. 1.54 − 38 =
  2. 2.503 − 491 =
  3. 3.209 − 185 =
  4. 4.91 − 78 =
  5. 5.123 − 98 =
  6. 6.75 − 44 =
  7. 7.320 − 295 =
  8. 8.1016 − 988 =
  9. 9.90 − 76 =
  10. 10.80 − 28 =
  11. 11.81 − 77 =
  12. 12.1016 − 986 =
  13. 13.322 − 285 =
  14. 14.73 − 29 =
  15. 15.310 − 294 =
  16. 16.85 − 77 =
  17. 17.320 − 282 =
  18. 18.211 − 175 =
  19. 19.83 − 76 =
  20. 20.72 − 40 =
  21. 21.504 − 483 =
  22. 22.1028 − 982 =
  23. 23.127 − 82 =
  24. 24.76 − 36 =
  25. 25.508 − 478 =
  26. 26.1019 − 981 =
  27. 27.118 − 92 =
  28. 28.128 − 95 =
  29. 29.228 − 175 =
  30. 30.85 − 66 =
  31. 31.513 − 494 =
  32. 32.504 − 488 =
  33. 33.1020 − 978 =
  34. 34.53 − 47 =
  35. 35.517 − 477 =
  36. 36.211 − 197 =
  37. 37.309 − 290 =
  38. 38.102 − 92 =
  39. 39.59 − 42 =
  40. 40.204 − 175 =

Answer key

  1. 16
  2. 12
  3. 24
  4. 13
  5. 25
  6. 31
  7. 25
  8. 28
  9. 14
  10. 52
  11. 4
  12. 30
  13. 37
  14. 44
  15. 16
  16. 8
  17. 38
  18. 36
  19. 7
  20. 32
  21. 21
  22. 46
  23. 45
  24. 40
  25. 30
  26. 38
  27. 26
  28. 33
  29. 53
  30. 19
  31. 19
  32. 16
  33. 42
  34. 6
  35. 40
  36. 14
  37. 19
  38. 10
  39. 17
  40. 29

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