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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 285 · 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. 1.409 − 38 =
  2. 2.341 − 56 =
  3. 3.98 − 57 =
  4. 4.175 − 98 =
  5. 5.246 − 28 =
  6. 6.498 − 98 =
  7. 7.475 − 36 =
  8. 8.214 − 66 =
  9. 9.293 − 56 =
  10. 10.355 − 68 =
  11. 11.81 − 29 =
  12. 12.595 − 86 =
  13. 13.148 − 77 =
  14. 14.130 − 19 =
  15. 15.554 − 38 =
  16. 16.357 − 99 =
  17. 17.163 − 59 =
  18. 18.300 − 26 =
  19. 19.422 − 66 =
  20. 20.378 − 88 =
  21. 21.60 − 28 =
  22. 22.203 − 27 =
  23. 23.337 − 39 =
  24. 24.461 − 56 =
  25. 25.137 − 99 =
  26. 26.170 − 28 =
  27. 27.93 − 16 =
  28. 28.194 − 59 =
  29. 29.569 − 29 =
  30. 30.528 − 19 =
  31. 31.324 − 58 =
  32. 32.298 − 96 =
  33. 33.453 − 39 =
  34. 34.457 − 36 =
  35. 35.483 − 89 =
  36. 36.140 − 29 =
  37. 37.515 − 79 =
  38. 38.443 − 59 =
  39. 39.310 − 79 =
  40. 40.70 − 17 =

Answer key

  1. 371
  2. 285
  3. 41
  4. 77
  5. 218
  6. 400
  7. 439
  8. 148
  9. 237
  10. 287
  11. 52
  12. 509
  13. 71
  14. 111
  15. 516
  16. 258
  17. 104
  18. 274
  19. 356
  20. 290
  21. 32
  22. 176
  23. 298
  24. 405
  25. 38
  26. 142
  27. 77
  28. 135
  29. 540
  30. 509
  31. 266
  32. 202
  33. 414
  34. 421
  35. 394
  36. 111
  37. 436
  38. 384
  39. 231
  40. 53

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