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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 453 · 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. 1.459 − 28 =
  2. 2.201 − 46 =
  3. 3.162 − 97 =
  4. 4.161 − 57 =
  5. 5.229 − 97 =
  6. 6.125 − 67 =
  7. 7.310 − 39 =
  8. 8.132 − 47 =
  9. 9.339 − 96 =
  10. 10.555 − 56 =
  11. 11.417 − 19 =
  12. 12.87 − 17 =
  13. 13.405 − 39 =
  14. 14.257 − 57 =
  15. 15.345 − 76 =
  16. 16.72 − 56 =
  17. 17.574 − 57 =
  18. 18.524 − 87 =
  19. 19.541 − 27 =
  20. 20.451 − 78 =
  21. 21.407 − 86 =
  22. 22.259 − 36 =
  23. 23.514 − 27 =
  24. 24.93 − 37 =
  25. 25.412 − 36 =
  26. 26.426 − 46 =
  27. 27.210 − 19 =
  28. 28.92 − 49 =
  29. 29.231 − 66 =
  30. 30.94 − 38 =
  31. 31.336 − 19 =
  32. 32.251 − 19 =
  33. 33.587 − 46 =
  34. 34.582 − 48 =
  35. 35.180 − 86 =
  36. 36.430 − 69 =
  37. 37.421 − 36 =
  38. 38.202 − 86 =
  39. 39.94 − 19 =
  40. 40.388 − 97 =

Answer key

  1. 431
  2. 155
  3. 65
  4. 104
  5. 132
  6. 58
  7. 271
  8. 85
  9. 243
  10. 499
  11. 398
  12. 70
  13. 366
  14. 200
  15. 269
  16. 16
  17. 517
  18. 437
  19. 514
  20. 373
  21. 321
  22. 223
  23. 487
  24. 56
  25. 376
  26. 380
  27. 191
  28. 43
  29. 165
  30. 56
  31. 317
  32. 232
  33. 541
  34. 534
  35. 94
  36. 361
  37. 385
  38. 116
  39. 75
  40. 291

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