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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 491 · 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. 1.509 − 57 =
  2. 2.571 − 98 =
  3. 3.476 − 96 =
  4. 4.196 − 99 =
  5. 5.186 − 98 =
  6. 6.204 − 27 =
  7. 7.209 − 79 =
  8. 8.89 − 37 =
  9. 9.187 − 29 =
  10. 10.351 − 79 =
  11. 11.257 − 96 =
  12. 12.104 − 26 =
  13. 13.583 − 88 =
  14. 14.252 − 79 =
  15. 15.336 − 19 =
  16. 16.394 − 16 =
  17. 17.135 − 48 =
  18. 18.326 − 97 =
  19. 19.183 − 38 =
  20. 20.80 − 46 =
  21. 21.319 − 66 =
  22. 22.390 − 18 =
  23. 23.397 − 37 =
  24. 24.372 − 39 =
  25. 25.473 − 46 =
  26. 26.119 − 59 =
  27. 27.186 − 77 =
  28. 28.450 − 49 =
  29. 29.145 − 26 =
  30. 30.461 − 69 =
  31. 31.410 − 38 =
  32. 32.487 − 97 =
  33. 33.362 − 59 =
  34. 34.58 − 57 =
  35. 35.182 − 58 =
  36. 36.187 − 96 =
  37. 37.124 − 89 =
  38. 38.336 − 36 =
  39. 39.117 − 17 =
  40. 40.260 − 78 =

Answer key

  1. 452
  2. 473
  3. 380
  4. 97
  5. 88
  6. 177
  7. 130
  8. 52
  9. 158
  10. 272
  11. 161
  12. 78
  13. 495
  14. 173
  15. 317
  16. 378
  17. 87
  18. 229
  19. 145
  20. 34
  21. 253
  22. 372
  23. 360
  24. 333
  25. 427
  26. 60
  27. 109
  28. 401
  29. 119
  30. 392
  31. 372
  32. 390
  33. 303
  34. 1
  35. 124
  36. 91
  37. 35
  38. 300
  39. 100
  40. 182

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