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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 220 · 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. 1.123 − 92 =
  2. 2.215 − 179 =
  3. 3.94 − 68 =
  4. 4.51 − 36 =
  5. 5.117 − 98 =
  6. 6.319 − 296 =
  7. 7.124 − 91 =
  8. 8.110 − 93 =
  9. 9.205 − 185 =
  10. 10.1003 − 995 =
  11. 11.106 − 78 =
  12. 12.206 − 183 =
  13. 13.104 − 96 =
  14. 14.521 − 482 =
  15. 15.1029 − 990 =
  16. 16.1015 − 985 =
  17. 17.114 − 93 =
  18. 18.1005 − 983 =
  19. 19.105 − 66 =
  20. 20.505 − 484 =
  21. 21.324 − 293 =
  22. 22.504 − 486 =
  23. 23.1022 − 982 =
  24. 24.308 − 280 =
  25. 25.75 − 41 =
  26. 26.301 − 294 =
  27. 27.305 − 287 =
  28. 28.212 − 180 =
  29. 29.1029 − 995 =
  30. 30.526 − 488 =
  31. 31.96 − 58 =
  32. 32.207 − 181 =
  33. 33.311 − 287 =
  34. 34.110 − 77 =
  35. 35.92 − 75 =
  36. 36.111 − 86 =
  37. 37.313 − 275 =
  38. 38.99 − 57 =
  39. 39.328 − 283 =
  40. 40.316 − 292 =

Answer key

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

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