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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 968 · 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. 1.84 − 37 =
  2. 2.560 − 17 =
  3. 3.201 − 46 =
  4. 4.217 − 77 =
  5. 5.132 − 68 =
  6. 6.413 − 97 =
  7. 7.521 − 79 =
  8. 8.122 − 96 =
  9. 9.223 − 36 =
  10. 10.410 − 68 =
  11. 11.407 − 98 =
  12. 12.178 − 47 =
  13. 13.222 − 68 =
  14. 14.348 − 88 =
  15. 15.200 − 19 =
  16. 16.187 − 99 =
  17. 17.465 − 37 =
  18. 18.247 − 59 =
  19. 19.493 − 88 =
  20. 20.344 − 19 =
  21. 21.583 − 58 =
  22. 22.291 − 26 =
  23. 23.521 − 37 =
  24. 24.221 − 87 =
  25. 25.87 − 39 =
  26. 26.467 − 28 =
  27. 27.172 − 96 =
  28. 28.234 − 68 =
  29. 29.312 − 28 =
  30. 30.165 − 87 =
  31. 31.167 − 78 =
  32. 32.599 − 17 =
  33. 33.87 − 56 =
  34. 34.493 − 89 =
  35. 35.458 − 29 =
  36. 36.84 − 76 =
  37. 37.89 − 86 =
  38. 38.338 − 99 =
  39. 39.172 − 17 =
  40. 40.506 − 66 =

Answer key

  1. 47
  2. 543
  3. 155
  4. 140
  5. 64
  6. 316
  7. 442
  8. 26
  9. 187
  10. 342
  11. 309
  12. 131
  13. 154
  14. 260
  15. 181
  16. 88
  17. 428
  18. 188
  19. 405
  20. 325
  21. 525
  22. 265
  23. 484
  24. 134
  25. 48
  26. 439
  27. 76
  28. 166
  29. 284
  30. 78
  31. 89
  32. 582
  33. 31
  34. 404
  35. 429
  36. 8
  37. 3
  38. 239
  39. 155
  40. 440

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