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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 841 · 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. 1.87 − 57 =
  2. 2.509 − 479 =
  3. 3.69 − 33 =
  4. 4.216 − 180 =
  5. 5.1007 − 979 =
  6. 6.81 − 78 =
  7. 7.309 − 292 =
  8. 8.75 − 44 =
  9. 9.75 − 30 =
  10. 10.111 − 88 =
  11. 11.108 − 76 =
  12. 12.315 − 287 =
  13. 13.110 − 75 =
  14. 14.202 − 196 =
  15. 15.1011 − 993 =
  16. 16.322 − 289 =
  17. 17.53 − 37 =
  18. 18.78 − 36 =
  19. 19.52 − 32 =
  20. 20.123 − 92 =
  21. 21.99 − 60 =
  22. 22.1009 − 982 =
  23. 23.216 − 190 =
  24. 24.130 − 87 =
  25. 25.117 − 89 =
  26. 26.76 − 48 =
  27. 27.105 − 97 =
  28. 28.128 − 94 =
  29. 29.103 − 90 =
  30. 30.1009 − 976 =
  31. 31.1017 − 990 =
  32. 32.204 − 177 =
  33. 33.111 − 81 =
  34. 34.57 − 27 =
  35. 35.330 − 298 =
  36. 36.109 − 74 =
  37. 37.99 − 78 =
  38. 38.67 − 30 =
  39. 39.325 − 296 =
  40. 40.125 − 94 =

Answer key

  1. 30
  2. 30
  3. 36
  4. 36
  5. 28
  6. 3
  7. 17
  8. 31
  9. 45
  10. 23
  11. 32
  12. 28
  13. 35
  14. 6
  15. 18
  16. 33
  17. 16
  18. 42
  19. 20
  20. 31
  21. 39
  22. 27
  23. 26
  24. 43
  25. 28
  26. 28
  27. 8
  28. 34
  29. 13
  30. 33
  31. 27
  32. 27
  33. 30
  34. 30
  35. 32
  36. 35
  37. 21
  38. 37
  39. 29
  40. 31

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