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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 362 · 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. 1.120 − 86 =
  2. 2.449 − 76 =
  3. 3.303 − 89 =
  4. 4.586 − 59 =
  5. 5.589 − 57 =
  6. 6.165 − 96 =
  7. 7.306 − 88 =
  8. 8.595 − 56 =
  9. 9.406 − 18 =
  10. 10.106 − 58 =
  11. 11.84 − 46 =
  12. 12.501 − 98 =
  13. 13.158 − 76 =
  14. 14.98 − 56 =
  15. 15.483 − 39 =
  16. 16.109 − 18 =
  17. 17.395 − 87 =
  18. 18.408 − 28 =
  19. 19.250 − 26 =
  20. 20.573 − 39 =
  21. 21.215 − 48 =
  22. 22.331 − 66 =
  23. 23.469 − 89 =
  24. 24.293 − 18 =
  25. 25.130 − 58 =
  26. 26.591 − 69 =
  27. 27.273 − 67 =
  28. 28.380 − 59 =
  29. 29.308 − 26 =
  30. 30.579 − 27 =
  31. 31.580 − 78 =
  32. 32.208 − 69 =
  33. 33.134 − 88 =
  34. 34.347 − 36 =
  35. 35.165 − 79 =
  36. 36.508 − 26 =
  37. 37.207 − 96 =
  38. 38.69 − 19 =
  39. 39.555 − 76 =
  40. 40.578 − 96 =

Answer key

  1. 34
  2. 373
  3. 214
  4. 527
  5. 532
  6. 69
  7. 218
  8. 539
  9. 388
  10. 48
  11. 38
  12. 403
  13. 82
  14. 42
  15. 444
  16. 91
  17. 308
  18. 380
  19. 224
  20. 534
  21. 167
  22. 265
  23. 380
  24. 275
  25. 72
  26. 522
  27. 206
  28. 321
  29. 282
  30. 552
  31. 502
  32. 139
  33. 46
  34. 311
  35. 86
  36. 482
  37. 111
  38. 50
  39. 479
  40. 482

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