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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 385 · 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. 1.112 − 92 =
  2. 2.201 − 188 =
  3. 3.67 − 46 =
  4. 4.66 − 26 =
  5. 5.94 − 57 =
  6. 6.116 − 96 =
  7. 7.1020 − 983 =
  8. 8.1030 − 997 =
  9. 9.95 − 55 =
  10. 10.1010 − 998 =
  11. 11.502 − 490 =
  12. 12.83 − 64 =
  13. 13.117 − 92 =
  14. 14.503 − 494 =
  15. 15.101 − 90 =
  16. 16.225 − 194 =
  17. 17.228 − 183 =
  18. 18.317 − 283 =
  19. 19.1021 − 995 =
  20. 20.74 − 28 =
  21. 21.93 − 69 =
  22. 22.104 − 92 =
  23. 23.71 − 48 =
  24. 24.218 − 194 =
  25. 25.215 − 176 =
  26. 26.307 − 285 =
  27. 27.121 − 96 =
  28. 28.102 − 67 =
  29. 29.307 − 277 =
  30. 30.94 − 56 =
  31. 31.329 − 294 =
  32. 32.1012 − 980 =
  33. 33.1003 − 993 =
  34. 34.81 − 63 =
  35. 35.1011 − 979 =
  36. 36.53 − 38 =
  37. 37.517 − 486 =
  38. 38.60 − 41 =
  39. 39.1020 − 975 =
  40. 40.327 − 295 =

Answer key

  1. 20
  2. 13
  3. 21
  4. 40
  5. 37
  6. 20
  7. 37
  8. 33
  9. 40
  10. 12
  11. 12
  12. 19
  13. 25
  14. 9
  15. 11
  16. 31
  17. 45
  18. 34
  19. 26
  20. 46
  21. 24
  22. 12
  23. 23
  24. 24
  25. 39
  26. 22
  27. 25
  28. 35
  29. 30
  30. 38
  31. 35
  32. 32
  33. 10
  34. 18
  35. 32
  36. 15
  37. 31
  38. 19
  39. 45
  40. 32

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