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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 465 · 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. 1.108 − 95 =
  2. 2.508 − 477 =
  3. 3.224 − 175 =
  4. 4.309 − 279 =
  5. 5.102 − 96 =
  6. 6.76 − 45 =
  7. 7.323 − 285 =
  8. 8.1029 − 996 =
  9. 9.524 − 495 =
  10. 10.1020 − 980 =
  11. 11.109 − 86 =
  12. 12.217 − 186 =
  13. 13.524 − 498 =
  14. 14.97 − 60 =
  15. 15.323 − 292 =
  16. 16.57 − 31 =
  17. 17.110 − 86 =
  18. 18.509 − 494 =
  19. 19.505 − 485 =
  20. 20.206 − 187 =
  21. 21.100 − 61 =
  22. 22.1007 − 978 =
  23. 23.330 − 298 =
  24. 24.213 − 189 =
  25. 25.1006 − 987 =
  26. 26.56 − 46 =
  27. 27.106 − 75 =
  28. 28.90 − 75 =
  29. 29.1024 − 993 =
  30. 30.51 − 42 =
  31. 31.310 − 275 =
  32. 32.89 − 69 =
  33. 33.111 − 83 =
  34. 34.1009 − 980 =
  35. 35.1021 − 992 =
  36. 36.224 − 198 =
  37. 37.122 − 80 =
  38. 38.1027 − 995 =
  39. 39.92 − 73 =
  40. 40.323 − 291 =

Answer key

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

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