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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 747 · 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. 1.311 − 58 =
  2. 2.55 − 46 =
  3. 3.388 − 68 =
  4. 4.499 − 76 =
  5. 5.182 − 96 =
  6. 6.464 − 49 =
  7. 7.387 − 47 =
  8. 8.292 − 56 =
  9. 9.594 − 77 =
  10. 10.352 − 86 =
  11. 11.195 − 46 =
  12. 12.145 − 17 =
  13. 13.453 − 19 =
  14. 14.379 − 39 =
  15. 15.349 − 36 =
  16. 16.341 − 26 =
  17. 17.370 − 37 =
  18. 18.549 − 57 =
  19. 19.142 − 96 =
  20. 20.591 − 66 =
  21. 21.578 − 26 =
  22. 22.251 − 56 =
  23. 23.199 − 19 =
  24. 24.478 − 77 =
  25. 25.273 − 56 =
  26. 26.111 − 26 =
  27. 27.380 − 36 =
  28. 28.180 − 76 =
  29. 29.382 − 47 =
  30. 30.275 − 19 =
  31. 31.164 − 56 =
  32. 32.337 − 28 =
  33. 33.515 − 56 =
  34. 34.217 − 67 =
  35. 35.541 − 38 =
  36. 36.152 − 66 =
  37. 37.522 − 46 =
  38. 38.308 − 36 =
  39. 39.585 − 36 =
  40. 40.485 − 76 =

Answer key

  1. 253
  2. 9
  3. 320
  4. 423
  5. 86
  6. 415
  7. 340
  8. 236
  9. 517
  10. 266
  11. 149
  12. 128
  13. 434
  14. 340
  15. 313
  16. 315
  17. 333
  18. 492
  19. 46
  20. 525
  21. 552
  22. 195
  23. 180
  24. 401
  25. 217
  26. 85
  27. 344
  28. 104
  29. 335
  30. 256
  31. 108
  32. 309
  33. 459
  34. 150
  35. 503
  36. 86
  37. 476
  38. 272
  39. 549
  40. 409

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