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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 293 · 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 − 76 =
  2. 2.93 − 16 =
  3. 3.148 − 27 =
  4. 4.333 − 28 =
  5. 5.149 − 87 =
  6. 6.65 − 38 =
  7. 7.474 − 86 =
  8. 8.599 − 66 =
  9. 9.397 − 27 =
  10. 10.252 − 28 =
  11. 11.373 − 27 =
  12. 12.263 − 96 =
  13. 13.413 − 68 =
  14. 14.130 − 66 =
  15. 15.462 − 67 =
  16. 16.528 − 67 =
  17. 17.147 − 36 =
  18. 18.538 − 48 =
  19. 19.246 − 97 =
  20. 20.282 − 39 =
  21. 21.308 − 69 =
  22. 22.596 − 18 =
  23. 23.250 − 56 =
  24. 24.170 − 27 =
  25. 25.489 − 79 =
  26. 26.524 − 37 =
  27. 27.560 − 46 =
  28. 28.431 − 36 =
  29. 29.341 − 27 =
  30. 30.148 − 79 =
  31. 31.421 − 28 =
  32. 32.429 − 49 =
  33. 33.308 − 87 =
  34. 34.365 − 97 =
  35. 35.365 − 59 =
  36. 36.259 − 76 =
  37. 37.345 − 18 =
  38. 38.209 − 18 =
  39. 39.332 − 57 =
  40. 40.268 − 99 =

Answer key

  1. 123
  2. 77
  3. 121
  4. 305
  5. 62
  6. 27
  7. 388
  8. 533
  9. 370
  10. 224
  11. 346
  12. 167
  13. 345
  14. 64
  15. 395
  16. 461
  17. 111
  18. 490
  19. 149
  20. 243
  21. 239
  22. 578
  23. 194
  24. 143
  25. 410
  26. 487
  27. 514
  28. 395
  29. 314
  30. 69
  31. 393
  32. 380
  33. 221
  34. 268
  35. 306
  36. 183
  37. 327
  38. 191
  39. 275
  40. 169

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