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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 29 · 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. 1.54 − 45 =
  2. 2.305 − 296 =
  3. 3.1022 − 984 =
  4. 4.203 − 182 =
  5. 5.510 − 483 =
  6. 6.322 − 296 =
  7. 7.65 − 47 =
  8. 8.108 − 81 =
  9. 9.205 − 196 =
  10. 10.302 − 292 =
  11. 11.505 − 490 =
  12. 12.121 − 90 =
  13. 13.123 − 80 =
  14. 14.218 − 177 =
  15. 15.1006 − 979 =
  16. 16.314 − 288 =
  17. 17.317 − 291 =
  18. 18.1002 − 992 =
  19. 19.507 − 497 =
  20. 20.72 − 26 =
  21. 21.58 − 26 =
  22. 22.528 − 489 =
  23. 23.521 − 494 =
  24. 24.63 − 39 =
  25. 25.87 − 62 =
  26. 26.88 − 67 =
  27. 27.521 − 491 =
  28. 28.502 − 497 =
  29. 29.1030 − 987 =
  30. 30.515 − 498 =
  31. 31.311 − 278 =
  32. 32.221 − 175 =
  33. 33.105 − 72 =
  34. 34.510 − 488 =
  35. 35.513 − 497 =
  36. 36.220 − 192 =
  37. 37.61 − 37 =
  38. 38.1002 − 982 =
  39. 39.1008 − 995 =
  40. 40.203 − 188 =

Answer key

  1. 9
  2. 9
  3. 38
  4. 21
  5. 27
  6. 26
  7. 18
  8. 27
  9. 9
  10. 10
  11. 15
  12. 31
  13. 43
  14. 41
  15. 27
  16. 26
  17. 26
  18. 10
  19. 10
  20. 46
  21. 32
  22. 39
  23. 27
  24. 24
  25. 25
  26. 21
  27. 30
  28. 5
  29. 43
  30. 17
  31. 33
  32. 46
  33. 33
  34. 22
  35. 16
  36. 28
  37. 24
  38. 20
  39. 13
  40. 15

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