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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 225 · 40 questions
TalentJR

The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.

NameDateTime takenScore ___ / 40
  1. 1.525 − 27 =
  2. 2.116 − 37 =
  3. 3.599 − 58 =
  4. 4.278 − 26 =
  5. 5.468 − 47 =
  6. 6.416 − 36 =
  7. 7.103 − 77 =
  8. 8.225 − 29 =
  9. 9.94 − 29 =
  10. 10.518 − 16 =
  11. 11.468 − 19 =
  12. 12.439 − 18 =
  13. 13.242 − 99 =
  14. 14.391 − 56 =
  15. 15.369 − 37 =
  16. 16.543 − 27 =
  17. 17.221 − 29 =
  18. 18.297 − 57 =
  19. 19.53 − 16 =
  20. 20.199 − 69 =
  21. 21.98 − 27 =
  22. 22.97 − 87 =
  23. 23.172 − 76 =
  24. 24.120 − 89 =
  25. 25.181 − 87 =
  26. 26.59 − 17 =
  27. 27.277 − 47 =
  28. 28.224 − 46 =
  29. 29.560 − 19 =
  30. 30.166 − 27 =
  31. 31.577 − 58 =
  32. 32.309 − 87 =
  33. 33.245 − 88 =
  34. 34.467 − 38 =
  35. 35.344 − 66 =
  36. 36.102 − 67 =
  37. 37.222 − 37 =
  38. 38.591 − 37 =
  39. 39.276 − 26 =
  40. 40.372 − 69 =

Answer key

  1. 498
  2. 79
  3. 541
  4. 252
  5. 421
  6. 380
  7. 26
  8. 196
  9. 65
  10. 502
  11. 449
  12. 421
  13. 143
  14. 335
  15. 332
  16. 516
  17. 192
  18. 240
  19. 37
  20. 130
  21. 71
  22. 10
  23. 96
  24. 31
  25. 94
  26. 42
  27. 230
  28. 178
  29. 541
  30. 139
  31. 519
  32. 222
  33. 157
  34. 429
  35. 278
  36. 35
  37. 185
  38. 554
  39. 250
  40. 303

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