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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 577 · 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. 1.330 − 96 =
  2. 2.591 − 68 =
  3. 3.117 − 27 =
  4. 4.214 − 16 =
  5. 5.135 − 99 =
  6. 6.148 − 49 =
  7. 7.450 − 77 =
  8. 8.82 − 28 =
  9. 9.217 − 58 =
  10. 10.304 − 17 =
  11. 11.146 − 88 =
  12. 12.165 − 26 =
  13. 13.156 − 19 =
  14. 14.162 − 36 =
  15. 15.99 − 67 =
  16. 16.451 − 59 =
  17. 17.574 − 36 =
  18. 18.464 − 86 =
  19. 19.293 − 48 =
  20. 20.94 − 79 =
  21. 21.381 − 89 =
  22. 22.189 − 19 =
  23. 23.193 − 78 =
  24. 24.186 − 27 =
  25. 25.124 − 86 =
  26. 26.581 − 98 =
  27. 27.266 − 28 =
  28. 28.520 − 39 =
  29. 29.328 − 99 =
  30. 30.592 − 86 =
  31. 31.424 − 26 =
  32. 32.170 − 59 =
  33. 33.196 − 98 =
  34. 34.268 − 39 =
  35. 35.311 − 39 =
  36. 36.158 − 68 =
  37. 37.420 − 97 =
  38. 38.348 − 16 =
  39. 39.273 − 39 =
  40. 40.551 − 16 =

Answer key

  1. 234
  2. 523
  3. 90
  4. 198
  5. 36
  6. 99
  7. 373
  8. 54
  9. 159
  10. 287
  11. 58
  12. 139
  13. 137
  14. 126
  15. 32
  16. 392
  17. 538
  18. 378
  19. 245
  20. 15
  21. 292
  22. 170
  23. 115
  24. 159
  25. 38
  26. 483
  27. 238
  28. 481
  29. 229
  30. 506
  31. 398
  32. 111
  33. 98
  34. 229
  35. 272
  36. 90
  37. 323
  38. 332
  39. 234
  40. 535

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