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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 485 · 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. 1.56 − 48 =
  2. 2.86 − 66 =
  3. 3.220 − 188 =
  4. 4.312 − 287 =
  5. 5.514 − 487 =
  6. 6.113 − 96 =
  7. 7.328 − 298 =
  8. 8.316 − 289 =
  9. 9.101 − 79 =
  10. 10.62 − 37 =
  11. 11.317 − 290 =
  12. 12.69 − 48 =
  13. 13.109 − 89 =
  14. 14.202 − 187 =
  15. 15.74 − 48 =
  16. 16.1002 − 987 =
  17. 17.318 − 277 =
  18. 18.123 − 92 =
  19. 19.326 − 284 =
  20. 20.518 − 487 =
  21. 21.84 − 64 =
  22. 22.517 − 483 =
  23. 23.112 − 98 =
  24. 24.224 − 182 =
  25. 25.91 − 72 =
  26. 26.1017 − 980 =
  27. 27.1019 − 990 =
  28. 28.51 − 47 =
  29. 29.1008 − 995 =
  30. 30.104 − 72 =
  31. 31.522 − 496 =
  32. 32.223 − 195 =
  33. 33.505 − 479 =
  34. 34.326 − 290 =
  35. 35.92 − 73 =
  36. 36.529 − 490 =
  37. 37.101 − 65 =
  38. 38.54 − 37 =
  39. 39.318 − 279 =
  40. 40.1021 − 984 =

Answer key

  1. 8
  2. 20
  3. 32
  4. 25
  5. 27
  6. 17
  7. 30
  8. 27
  9. 22
  10. 25
  11. 27
  12. 21
  13. 20
  14. 15
  15. 26
  16. 15
  17. 41
  18. 31
  19. 42
  20. 31
  21. 20
  22. 34
  23. 14
  24. 42
  25. 19
  26. 37
  27. 29
  28. 4
  29. 13
  30. 32
  31. 26
  32. 28
  33. 26
  34. 36
  35. 19
  36. 39
  37. 36
  38. 17
  39. 39
  40. 37

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