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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 958 · 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. 1.128 − 79 =
  2. 2.1025 − 985 =
  3. 3.68 − 33 =
  4. 4.1017 − 997 =
  5. 5.102 − 59 =
  6. 6.1029 − 996 =
  7. 7.108 − 98 =
  8. 8.113 − 84 =
  9. 9.202 − 181 =
  10. 10.503 − 497 =
  11. 11.317 − 298 =
  12. 12.526 − 482 =
  13. 13.318 − 275 =
  14. 14.95 − 62 =
  15. 15.86 − 76 =
  16. 16.211 − 180 =
  17. 17.1013 − 988 =
  18. 18.114 − 88 =
  19. 19.87 − 70 =
  20. 20.308 − 291 =
  21. 21.67 − 30 =
  22. 22.301 − 279 =
  23. 23.105 − 77 =
  24. 24.1025 − 995 =
  25. 25.108 − 72 =
  26. 26.108 − 86 =
  27. 27.220 − 195 =
  28. 28.311 − 278 =
  29. 29.55 − 33 =
  30. 30.88 − 72 =
  31. 31.1007 − 977 =
  32. 32.530 − 489 =
  33. 33.206 − 187 =
  34. 34.1011 − 987 =
  35. 35.203 − 178 =
  36. 36.129 − 82 =
  37. 37.60 − 39 =
  38. 38.72 − 35 =
  39. 39.529 − 497 =
  40. 40.1005 − 979 =

Answer key

  1. 49
  2. 40
  3. 35
  4. 20
  5. 43
  6. 33
  7. 10
  8. 29
  9. 21
  10. 6
  11. 19
  12. 44
  13. 43
  14. 33
  15. 10
  16. 31
  17. 25
  18. 26
  19. 17
  20. 17
  21. 37
  22. 22
  23. 28
  24. 30
  25. 36
  26. 22
  27. 25
  28. 33
  29. 22
  30. 16
  31. 30
  32. 41
  33. 19
  34. 24
  35. 25
  36. 47
  37. 21
  38. 37
  39. 32
  40. 26

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