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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 174 · 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. 1.153 − 69 =
  2. 2.292 − 77 =
  3. 3.546 − 99 =
  4. 4.179 − 97 =
  5. 5.450 − 16 =
  6. 6.397 − 57 =
  7. 7.497 − 57 =
  8. 8.164 − 86 =
  9. 9.152 − 58 =
  10. 10.449 − 46 =
  11. 11.169 − 48 =
  12. 12.433 − 36 =
  13. 13.97 − 26 =
  14. 14.515 − 76 =
  15. 15.454 − 99 =
  16. 16.149 − 47 =
  17. 17.82 − 68 =
  18. 18.425 − 69 =
  19. 19.464 − 99 =
  20. 20.131 − 38 =
  21. 21.169 − 96 =
  22. 22.264 − 26 =
  23. 23.265 − 27 =
  24. 24.129 − 56 =
  25. 25.176 − 76 =
  26. 26.426 − 59 =
  27. 27.332 − 69 =
  28. 28.181 − 48 =
  29. 29.253 − 16 =
  30. 30.233 − 46 =
  31. 31.85 − 77 =
  32. 32.379 − 79 =
  33. 33.149 − 16 =
  34. 34.131 − 79 =
  35. 35.170 − 77 =
  36. 36.179 − 77 =
  37. 37.146 − 16 =
  38. 38.169 − 39 =
  39. 39.106 − 97 =
  40. 40.380 − 16 =

Answer key

  1. 84
  2. 215
  3. 447
  4. 82
  5. 434
  6. 340
  7. 440
  8. 78
  9. 94
  10. 403
  11. 121
  12. 397
  13. 71
  14. 439
  15. 355
  16. 102
  17. 14
  18. 356
  19. 365
  20. 93
  21. 73
  22. 238
  23. 238
  24. 73
  25. 100
  26. 367
  27. 263
  28. 133
  29. 237
  30. 187
  31. 8
  32. 300
  33. 133
  34. 52
  35. 93
  36. 102
  37. 130
  38. 130
  39. 9
  40. 364

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