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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 308 · 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. 1.188 − 96 =
  2. 2.387 − 19 =
  3. 3.244 − 27 =
  4. 4.139 − 76 =
  5. 5.391 − 89 =
  6. 6.593 − 16 =
  7. 7.526 − 19 =
  8. 8.368 − 26 =
  9. 9.263 − 16 =
  10. 10.480 − 76 =
  11. 11.457 − 46 =
  12. 12.115 − 76 =
  13. 13.209 − 19 =
  14. 14.175 − 19 =
  15. 15.556 − 39 =
  16. 16.267 − 49 =
  17. 17.357 − 76 =
  18. 18.249 − 18 =
  19. 19.476 − 28 =
  20. 20.308 − 67 =
  21. 21.58 − 29 =
  22. 22.170 − 16 =
  23. 23.200 − 58 =
  24. 24.280 − 49 =
  25. 25.275 − 89 =
  26. 26.505 − 17 =
  27. 27.213 − 96 =
  28. 28.166 − 86 =
  29. 29.310 − 26 =
  30. 30.89 − 17 =
  31. 31.511 − 49 =
  32. 32.300 − 57 =
  33. 33.556 − 99 =
  34. 34.133 − 58 =
  35. 35.597 − 49 =
  36. 36.168 − 76 =
  37. 37.56 − 27 =
  38. 38.122 − 18 =
  39. 39.295 − 76 =
  40. 40.274 − 47 =

Answer key

  1. 92
  2. 368
  3. 217
  4. 63
  5. 302
  6. 577
  7. 507
  8. 342
  9. 247
  10. 404
  11. 411
  12. 39
  13. 190
  14. 156
  15. 517
  16. 218
  17. 281
  18. 231
  19. 448
  20. 241
  21. 29
  22. 154
  23. 142
  24. 231
  25. 186
  26. 488
  27. 117
  28. 80
  29. 284
  30. 72
  31. 462
  32. 243
  33. 457
  34. 75
  35. 548
  36. 92
  37. 29
  38. 104
  39. 219
  40. 227

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