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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 390 · 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. 1.506 − 477 =
  2. 2.1027 − 988 =
  3. 3.1009 − 992 =
  4. 4.328 − 283 =
  5. 5.202 − 197 =
  6. 6.508 − 481 =
  7. 7.320 − 292 =
  8. 8.124 − 78 =
  9. 9.60 − 46 =
  10. 10.1028 − 995 =
  11. 11.115 − 97 =
  12. 12.64 − 46 =
  13. 13.1030 − 986 =
  14. 14.202 − 190 =
  15. 15.130 − 75 =
  16. 16.101 − 75 =
  17. 17.505 − 475 =
  18. 18.227 − 197 =
  19. 19.215 − 196 =
  20. 20.103 − 73 =
  21. 21.305 − 280 =
  22. 22.121 − 94 =
  23. 23.517 − 480 =
  24. 24.116 − 97 =
  25. 25.117 − 77 =
  26. 26.88 − 63 =
  27. 27.230 − 196 =
  28. 28.1021 − 986 =
  29. 29.511 − 475 =
  30. 30.51 − 42 =
  31. 31.82 − 71 =
  32. 32.226 − 185 =
  33. 33.86 − 74 =
  34. 34.1027 − 997 =
  35. 35.98 − 64 =
  36. 36.107 − 85 =
  37. 37.310 − 284 =
  38. 38.83 − 71 =
  39. 39.310 − 297 =
  40. 40.304 − 275 =

Answer key

  1. 29
  2. 39
  3. 17
  4. 45
  5. 5
  6. 27
  7. 28
  8. 46
  9. 14
  10. 33
  11. 18
  12. 18
  13. 44
  14. 12
  15. 55
  16. 26
  17. 30
  18. 30
  19. 19
  20. 30
  21. 25
  22. 27
  23. 37
  24. 19
  25. 40
  26. 25
  27. 34
  28. 35
  29. 36
  30. 9
  31. 11
  32. 41
  33. 12
  34. 30
  35. 34
  36. 22
  37. 26
  38. 12
  39. 13
  40. 29

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