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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 818 · 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. 1.68 − 42 =
  2. 2.1018 − 993 =
  3. 3.111 − 98 =
  4. 4.319 − 285 =
  5. 5.210 − 186 =
  6. 6.103 − 79 =
  7. 7.56 − 26 =
  8. 8.523 − 495 =
  9. 9.303 − 294 =
  10. 10.98 − 65 =
  11. 11.510 − 475 =
  12. 12.58 − 44 =
  13. 13.110 − 93 =
  14. 14.1030 − 991 =
  15. 15.57 − 44 =
  16. 16.320 − 283 =
  17. 17.214 − 194 =
  18. 18.130 − 86 =
  19. 19.66 − 41 =
  20. 20.79 − 39 =
  21. 21.215 − 194 =
  22. 22.84 − 77 =
  23. 23.110 − 78 =
  24. 24.71 − 44 =
  25. 25.1022 − 994 =
  26. 26.93 − 76 =
  27. 27.1005 − 996 =
  28. 28.312 − 289 =
  29. 29.124 − 96 =
  30. 30.221 − 179 =
  31. 31.54 − 26 =
  32. 32.313 − 285 =
  33. 33.58 − 40 =
  34. 34.117 − 84 =
  35. 35.88 − 68 =
  36. 36.202 − 184 =
  37. 37.1026 − 997 =
  38. 38.1019 − 986 =
  39. 39.90 − 74 =
  40. 40.77 − 45 =

Answer key

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

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