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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 715 · 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. 1.199 − 97 =
  2. 2.450 − 98 =
  3. 3.289 − 99 =
  4. 4.563 − 67 =
  5. 5.372 − 39 =
  6. 6.386 − 37 =
  7. 7.550 − 38 =
  8. 8.494 − 38 =
  9. 9.105 − 38 =
  10. 10.82 − 67 =
  11. 11.278 − 66 =
  12. 12.111 − 87 =
  13. 13.153 − 17 =
  14. 14.294 − 58 =
  15. 15.363 − 29 =
  16. 16.158 − 49 =
  17. 17.104 − 89 =
  18. 18.232 − 19 =
  19. 19.221 − 98 =
  20. 20.242 − 57 =
  21. 21.163 − 98 =
  22. 22.515 − 27 =
  23. 23.169 − 36 =
  24. 24.377 − 56 =
  25. 25.317 − 39 =
  26. 26.504 − 26 =
  27. 27.349 − 58 =
  28. 28.505 − 56 =
  29. 29.582 − 46 =
  30. 30.368 − 66 =
  31. 31.478 − 86 =
  32. 32.396 − 86 =
  33. 33.273 − 29 =
  34. 34.334 − 56 =
  35. 35.180 − 76 =
  36. 36.149 − 69 =
  37. 37.556 − 47 =
  38. 38.332 − 38 =
  39. 39.441 − 97 =
  40. 40.248 − 17 =

Answer key

  1. 102
  2. 352
  3. 190
  4. 496
  5. 333
  6. 349
  7. 512
  8. 456
  9. 67
  10. 15
  11. 212
  12. 24
  13. 136
  14. 236
  15. 334
  16. 109
  17. 15
  18. 213
  19. 123
  20. 185
  21. 65
  22. 488
  23. 133
  24. 321
  25. 278
  26. 478
  27. 291
  28. 449
  29. 536
  30. 302
  31. 392
  32. 310
  33. 244
  34. 278
  35. 104
  36. 80
  37. 509
  38. 294
  39. 344
  40. 231

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