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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 734 · 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. 1.366 − 78 =
  2. 2.117 − 19 =
  3. 3.212 − 99 =
  4. 4.178 − 28 =
  5. 5.292 − 59 =
  6. 6.156 − 69 =
  7. 7.546 − 16 =
  8. 8.522 − 87 =
  9. 9.97 − 69 =
  10. 10.312 − 18 =
  11. 11.483 − 96 =
  12. 12.167 − 68 =
  13. 13.486 − 68 =
  14. 14.154 − 57 =
  15. 15.335 − 38 =
  16. 16.388 − 67 =
  17. 17.201 − 56 =
  18. 18.107 − 18 =
  19. 19.104 − 96 =
  20. 20.447 − 58 =
  21. 21.200 − 27 =
  22. 22.395 − 87 =
  23. 23.384 − 19 =
  24. 24.574 − 47 =
  25. 25.455 − 67 =
  26. 26.180 − 89 =
  27. 27.442 − 28 =
  28. 28.156 − 56 =
  29. 29.366 − 26 =
  30. 30.523 − 26 =
  31. 31.239 − 39 =
  32. 32.486 − 97 =
  33. 33.194 − 97 =
  34. 34.594 − 37 =
  35. 35.458 − 76 =
  36. 36.505 − 39 =
  37. 37.543 − 96 =
  38. 38.430 − 77 =
  39. 39.224 − 56 =
  40. 40.99 − 37 =

Answer key

  1. 288
  2. 98
  3. 113
  4. 150
  5. 233
  6. 87
  7. 530
  8. 435
  9. 28
  10. 294
  11. 387
  12. 99
  13. 418
  14. 97
  15. 297
  16. 321
  17. 145
  18. 89
  19. 8
  20. 389
  21. 173
  22. 308
  23. 365
  24. 527
  25. 388
  26. 91
  27. 414
  28. 100
  29. 340
  30. 497
  31. 200
  32. 389
  33. 97
  34. 557
  35. 382
  36. 466
  37. 447
  38. 353
  39. 168
  40. 62

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