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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 883 · 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. 1.201 − 16 =
  2. 2.309 − 16 =
  3. 3.228 − 19 =
  4. 4.489 − 17 =
  5. 5.233 − 69 =
  6. 6.154 − 39 =
  7. 7.346 − 16 =
  8. 8.515 − 89 =
  9. 9.587 − 39 =
  10. 10.135 − 46 =
  11. 11.384 − 57 =
  12. 12.141 − 37 =
  13. 13.184 − 26 =
  14. 14.190 − 97 =
  15. 15.378 − 66 =
  16. 16.589 − 39 =
  17. 17.221 − 38 =
  18. 18.146 − 28 =
  19. 19.540 − 36 =
  20. 20.454 − 77 =
  21. 21.75 − 37 =
  22. 22.350 − 89 =
  23. 23.578 − 48 =
  24. 24.524 − 17 =
  25. 25.432 − 99 =
  26. 26.119 − 77 =
  27. 27.366 − 37 =
  28. 28.373 − 17 =
  29. 29.591 − 17 =
  30. 30.444 − 36 =
  31. 31.96 − 69 =
  32. 32.277 − 87 =
  33. 33.468 − 27 =
  34. 34.281 − 18 =
  35. 35.302 − 38 =
  36. 36.465 − 57 =
  37. 37.163 − 77 =
  38. 38.559 − 78 =
  39. 39.473 − 58 =
  40. 40.462 − 66 =

Answer key

  1. 185
  2. 293
  3. 209
  4. 472
  5. 164
  6. 115
  7. 330
  8. 426
  9. 548
  10. 89
  11. 327
  12. 104
  13. 158
  14. 93
  15. 312
  16. 550
  17. 183
  18. 118
  19. 504
  20. 377
  21. 38
  22. 261
  23. 530
  24. 507
  25. 333
  26. 42
  27. 329
  28. 356
  29. 574
  30. 408
  31. 27
  32. 190
  33. 441
  34. 263
  35. 264
  36. 408
  37. 86
  38. 481
  39. 415
  40. 396

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