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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 851 · 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. 1.51 − 39 =
  2. 2.77 − 47 =
  3. 3.107 − 84 =
  4. 4.1026 − 985 =
  5. 5.1003 − 979 =
  6. 6.112 − 91 =
  7. 7.64 − 25 =
  8. 8.503 − 485 =
  9. 9.304 − 297 =
  10. 10.324 − 284 =
  11. 11.106 − 76 =
  12. 12.73 − 43 =
  13. 13.1003 − 995 =
  14. 14.207 − 196 =
  15. 15.55 − 34 =
  16. 16.307 − 294 =
  17. 17.1005 − 993 =
  18. 18.74 − 48 =
  19. 19.104 − 92 =
  20. 20.312 − 285 =
  21. 21.52 − 46 =
  22. 22.1002 − 990 =
  23. 23.104 − 56 =
  24. 24.1026 − 990 =
  25. 25.511 − 480 =
  26. 26.106 − 62 =
  27. 27.93 − 75 =
  28. 28.327 − 280 =
  29. 29.62 − 25 =
  30. 30.66 − 27 =
  31. 31.519 − 476 =
  32. 32.1009 − 993 =
  33. 33.224 − 194 =
  34. 34.508 − 476 =
  35. 35.509 − 493 =
  36. 36.1011 − 990 =
  37. 37.101 − 86 =
  38. 38.122 − 78 =
  39. 39.52 − 37 =
  40. 40.209 − 184 =

Answer key

  1. 12
  2. 30
  3. 23
  4. 41
  5. 24
  6. 21
  7. 39
  8. 18
  9. 7
  10. 40
  11. 30
  12. 30
  13. 8
  14. 11
  15. 21
  16. 13
  17. 12
  18. 26
  19. 12
  20. 27
  21. 6
  22. 12
  23. 48
  24. 36
  25. 31
  26. 44
  27. 18
  28. 47
  29. 37
  30. 39
  31. 43
  32. 16
  33. 30
  34. 32
  35. 16
  36. 21
  37. 15
  38. 44
  39. 15
  40. 25

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