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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 555 · 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. 1.510 − 482 =
  2. 2.104 − 67 =
  3. 3.1018 − 997 =
  4. 4.85 − 65 =
  5. 5.222 − 176 =
  6. 6.102 − 91 =
  7. 7.528 − 482 =
  8. 8.106 − 92 =
  9. 9.1027 − 986 =
  10. 10.506 − 484 =
  11. 11.519 − 478 =
  12. 12.230 − 178 =
  13. 13.504 − 496 =
  14. 14.109 − 67 =
  15. 15.114 − 93 =
  16. 16.211 − 189 =
  17. 17.73 − 39 =
  18. 18.526 − 495 =
  19. 19.109 − 65 =
  20. 20.63 − 34 =
  21. 21.1024 − 991 =
  22. 22.51 − 38 =
  23. 23.65 − 39 =
  24. 24.1018 − 988 =
  25. 25.321 − 281 =
  26. 26.201 − 191 =
  27. 27.107 − 77 =
  28. 28.106 − 96 =
  29. 29.320 − 290 =
  30. 30.307 − 289 =
  31. 31.62 − 30 =
  32. 32.209 − 190 =
  33. 33.63 − 25 =
  34. 34.529 − 485 =
  35. 35.1022 − 992 =
  36. 36.514 − 484 =
  37. 37.504 − 475 =
  38. 38.218 − 189 =
  39. 39.316 − 291 =
  40. 40.513 − 489 =

Answer key

  1. 28
  2. 37
  3. 21
  4. 20
  5. 46
  6. 11
  7. 46
  8. 14
  9. 41
  10. 22
  11. 41
  12. 52
  13. 8
  14. 42
  15. 21
  16. 22
  17. 34
  18. 31
  19. 44
  20. 29
  21. 33
  22. 13
  23. 26
  24. 30
  25. 40
  26. 10
  27. 30
  28. 10
  29. 30
  30. 18
  31. 32
  32. 19
  33. 38
  34. 44
  35. 30
  36. 30
  37. 29
  38. 29
  39. 25
  40. 24

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