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Subtraction by Counting Up Worksheet

Mental maths lesson 5: Subtract by counting up · Set 578 · 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 − 83 =
  2. 2.503 − 497 =
  3. 3.89 − 72 =
  4. 4.230 − 182 =
  5. 5.95 − 68 =
  6. 6.1011 − 982 =
  7. 7.330 − 290 =
  8. 8.227 − 186 =
  9. 9.1008 − 975 =
  10. 10.109 − 84 =
  11. 11.321 − 296 =
  12. 12.70 − 28 =
  13. 13.525 − 487 =
  14. 14.54 − 28 =
  15. 15.319 − 286 =
  16. 16.52 − 46 =
  17. 17.111 − 78 =
  18. 18.96 − 55 =
  19. 19.95 − 76 =
  20. 20.105 − 87 =
  21. 21.523 − 488 =
  22. 22.316 − 287 =
  23. 23.70 − 48 =
  24. 24.219 − 179 =
  25. 25.1013 − 981 =
  26. 26.315 − 276 =
  27. 27.319 − 278 =
  28. 28.525 − 491 =
  29. 29.321 − 285 =
  30. 30.1008 − 988 =
  31. 31.306 − 297 =
  32. 32.520 − 493 =
  33. 33.523 − 478 =
  34. 34.105 − 78 =
  35. 35.217 − 178 =
  36. 36.123 − 97 =
  37. 37.70 − 32 =
  38. 38.105 − 63 =
  39. 39.56 − 34 =
  40. 40.104 − 94 =

Answer key

  1. 29
  2. 6
  3. 17
  4. 48
  5. 27
  6. 29
  7. 40
  8. 41
  9. 33
  10. 25
  11. 25
  12. 42
  13. 38
  14. 26
  15. 33
  16. 6
  17. 33
  18. 41
  19. 19
  20. 18
  21. 35
  22. 29
  23. 22
  24. 40
  25. 32
  26. 39
  27. 41
  28. 34
  29. 36
  30. 20
  31. 9
  32. 27
  33. 45
  34. 27
  35. 39
  36. 26
  37. 38
  38. 42
  39. 22
  40. 10

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