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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 45 · 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. 1.53 − 34 =
  2. 2.506 − 497 =
  3. 3.1004 − 975 =
  4. 4.315 − 284 =
  5. 5.210 − 177 =
  6. 6.65 − 32 =
  7. 7.63 − 40 =
  8. 8.97 − 67 =
  9. 9.60 − 37 =
  10. 10.91 − 65 =
  11. 11.84 − 62 =
  12. 12.65 − 35 =
  13. 13.516 − 479 =
  14. 14.70 − 44 =
  15. 15.81 − 72 =
  16. 16.315 − 283 =
  17. 17.83 − 55 =
  18. 18.208 − 195 =
  19. 19.64 − 25 =
  20. 20.95 − 60 =
  21. 21.1009 − 994 =
  22. 22.130 − 88 =
  23. 23.102 − 78 =
  24. 24.1026 − 997 =
  25. 25.94 − 62 =
  26. 26.1018 − 978 =
  27. 27.87 − 68 =
  28. 28.228 − 195 =
  29. 29.126 − 76 =
  30. 30.526 − 484 =
  31. 31.81 − 75 =
  32. 32.319 − 277 =
  33. 33.76 − 47 =
  34. 34.53 − 35 =
  35. 35.93 − 70 =
  36. 36.103 − 74 =
  37. 37.504 − 476 =
  38. 38.96 − 75 =
  39. 39.207 − 184 =
  40. 40.68 − 48 =

Answer key

  1. 19
  2. 9
  3. 29
  4. 31
  5. 33
  6. 33
  7. 23
  8. 30
  9. 23
  10. 26
  11. 22
  12. 30
  13. 37
  14. 26
  15. 9
  16. 32
  17. 28
  18. 13
  19. 39
  20. 35
  21. 15
  22. 42
  23. 24
  24. 29
  25. 32
  26. 40
  27. 19
  28. 33
  29. 50
  30. 42
  31. 6
  32. 42
  33. 29
  34. 18
  35. 23
  36. 29
  37. 28
  38. 21
  39. 23
  40. 20

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