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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 144 · 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. 1.1020 − 986 =
  2. 2.85 − 74 =
  3. 3.1018 − 989 =
  4. 4.313 − 278 =
  5. 5.503 − 498 =
  6. 6.80 − 42 =
  7. 7.123 − 95 =
  8. 8.322 − 298 =
  9. 9.1009 − 987 =
  10. 10.1014 − 984 =
  11. 11.112 − 79 =
  12. 12.52 − 27 =
  13. 13.103 − 78 =
  14. 14.105 − 72 =
  15. 15.107 − 98 =
  16. 16.125 − 79 =
  17. 17.524 − 485 =
  18. 18.105 − 79 =
  19. 19.1023 − 993 =
  20. 20.105 − 81 =
  21. 21.94 − 78 =
  22. 22.1027 − 986 =
  23. 23.66 − 47 =
  24. 24.206 − 195 =
  25. 25.75 − 32 =
  26. 26.127 − 95 =
  27. 27.86 − 78 =
  28. 28.1011 − 989 =
  29. 29.64 − 36 =
  30. 30.1022 − 980 =
  31. 31.504 − 497 =
  32. 32.130 − 79 =
  33. 33.102 − 80 =
  34. 34.110 − 63 =
  35. 35.505 − 495 =
  36. 36.84 − 68 =
  37. 37.325 − 287 =
  38. 38.119 − 76 =
  39. 39.101 − 86 =
  40. 40.105 − 58 =

Answer key

  1. 34
  2. 11
  3. 29
  4. 35
  5. 5
  6. 38
  7. 28
  8. 24
  9. 22
  10. 30
  11. 33
  12. 25
  13. 25
  14. 33
  15. 9
  16. 46
  17. 39
  18. 26
  19. 30
  20. 24
  21. 16
  22. 41
  23. 19
  24. 11
  25. 43
  26. 32
  27. 8
  28. 22
  29. 28
  30. 42
  31. 7
  32. 51
  33. 22
  34. 47
  35. 10
  36. 16
  37. 38
  38. 43
  39. 15
  40. 47

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