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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 294 · 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. 1.283 − 76 =
  2. 2.126 − 17 =
  3. 3.534 − 56 =
  4. 4.77 − 56 =
  5. 5.323 − 39 =
  6. 6.569 − 16 =
  7. 7.174 − 86 =
  8. 8.94 − 27 =
  9. 9.141 − 77 =
  10. 10.265 − 29 =
  11. 11.507 − 39 =
  12. 12.173 − 48 =
  13. 13.266 − 48 =
  14. 14.175 − 89 =
  15. 15.531 − 66 =
  16. 16.224 − 59 =
  17. 17.375 − 67 =
  18. 18.432 − 26 =
  19. 19.569 − 26 =
  20. 20.169 − 78 =
  21. 21.134 − 28 =
  22. 22.505 − 18 =
  23. 23.152 − 96 =
  24. 24.192 − 69 =
  25. 25.207 − 96 =
  26. 26.462 − 68 =
  27. 27.81 − 78 =
  28. 28.588 − 87 =
  29. 29.406 − 17 =
  30. 30.581 − 76 =
  31. 31.368 − 97 =
  32. 32.119 − 76 =
  33. 33.257 − 86 =
  34. 34.146 − 28 =
  35. 35.173 − 36 =
  36. 36.168 − 77 =
  37. 37.341 − 79 =
  38. 38.503 − 38 =
  39. 39.121 − 89 =
  40. 40.187 − 69 =

Answer key

  1. 207
  2. 109
  3. 478
  4. 21
  5. 284
  6. 553
  7. 88
  8. 67
  9. 64
  10. 236
  11. 468
  12. 125
  13. 218
  14. 86
  15. 465
  16. 165
  17. 308
  18. 406
  19. 543
  20. 91
  21. 106
  22. 487
  23. 56
  24. 123
  25. 111
  26. 394
  27. 3
  28. 501
  29. 389
  30. 505
  31. 271
  32. 43
  33. 171
  34. 118
  35. 137
  36. 91
  37. 262
  38. 465
  39. 32
  40. 118

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