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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 875 · 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. 1.521 − 485 =
  2. 2.302 − 296 =
  3. 3.1017 − 987 =
  4. 4.515 − 489 =
  5. 5.513 − 494 =
  6. 6.517 − 477 =
  7. 7.108 − 61 =
  8. 8.306 − 297 =
  9. 9.512 − 498 =
  10. 10.89 − 62 =
  11. 11.94 − 73 =
  12. 12.1019 − 985 =
  13. 13.104 − 97 =
  14. 14.519 − 476 =
  15. 15.317 − 297 =
  16. 16.526 − 478 =
  17. 17.215 − 186 =
  18. 18.1009 − 978 =
  19. 19.117 − 95 =
  20. 20.503 − 491 =
  21. 21.75 − 37 =
  22. 22.129 − 81 =
  23. 23.81 − 63 =
  24. 24.101 − 77 =
  25. 25.93 − 70 =
  26. 26.76 − 48 =
  27. 27.98 − 73 =
  28. 28.106 − 82 =
  29. 29.105 − 65 =
  30. 30.306 − 291 =
  31. 31.304 − 293 =
  32. 32.120 − 92 =
  33. 33.1005 − 991 =
  34. 34.304 − 295 =
  35. 35.57 − 30 =
  36. 36.104 − 71 =
  37. 37.307 − 278 =
  38. 38.102 − 98 =
  39. 39.529 − 479 =
  40. 40.227 − 177 =

Answer key

  1. 36
  2. 6
  3. 30
  4. 26
  5. 19
  6. 40
  7. 47
  8. 9
  9. 14
  10. 27
  11. 21
  12. 34
  13. 7
  14. 43
  15. 20
  16. 48
  17. 29
  18. 31
  19. 22
  20. 12
  21. 38
  22. 48
  23. 18
  24. 24
  25. 23
  26. 28
  27. 25
  28. 24
  29. 40
  30. 15
  31. 11
  32. 28
  33. 14
  34. 9
  35. 27
  36. 33
  37. 29
  38. 4
  39. 50
  40. 50

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