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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 776 · 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. 1.516 − 38 =
  2. 2.211 − 68 =
  3. 3.54 − 28 =
  4. 4.176 − 96 =
  5. 5.544 − 27 =
  6. 6.488 − 59 =
  7. 7.528 − 67 =
  8. 8.362 − 48 =
  9. 9.163 − 38 =
  10. 10.379 − 96 =
  11. 11.59 − 49 =
  12. 12.252 − 76 =
  13. 13.148 − 87 =
  14. 14.174 − 96 =
  15. 15.246 − 17 =
  16. 16.132 − 67 =
  17. 17.581 − 78 =
  18. 18.366 − 37 =
  19. 19.232 − 87 =
  20. 20.400 − 47 =
  21. 21.248 − 86 =
  22. 22.169 − 38 =
  23. 23.543 − 99 =
  24. 24.162 − 69 =
  25. 25.368 − 66 =
  26. 26.466 − 28 =
  27. 27.100 − 17 =
  28. 28.154 − 96 =
  29. 29.566 − 87 =
  30. 30.574 − 86 =
  31. 31.109 − 59 =
  32. 32.462 − 96 =
  33. 33.431 − 29 =
  34. 34.266 − 88 =
  35. 35.327 − 47 =
  36. 36.367 − 19 =
  37. 37.211 − 28 =
  38. 38.478 − 88 =
  39. 39.570 − 18 =
  40. 40.323 − 99 =

Answer key

  1. 478
  2. 143
  3. 26
  4. 80
  5. 517
  6. 429
  7. 461
  8. 314
  9. 125
  10. 283
  11. 10
  12. 176
  13. 61
  14. 78
  15. 229
  16. 65
  17. 503
  18. 329
  19. 145
  20. 353
  21. 162
  22. 131
  23. 444
  24. 93
  25. 302
  26. 438
  27. 83
  28. 58
  29. 479
  30. 488
  31. 50
  32. 366
  33. 402
  34. 178
  35. 280
  36. 348
  37. 183
  38. 390
  39. 552
  40. 224

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