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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 602 · 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. 1.375 − 86 =
  2. 2.490 − 69 =
  3. 3.295 − 58 =
  4. 4.591 − 47 =
  5. 5.370 − 88 =
  6. 6.430 − 28 =
  7. 7.293 − 36 =
  8. 8.108 − 86 =
  9. 9.141 − 79 =
  10. 10.384 − 46 =
  11. 11.539 − 96 =
  12. 12.566 − 37 =
  13. 13.434 − 29 =
  14. 14.171 − 99 =
  15. 15.121 − 79 =
  16. 16.453 − 86 =
  17. 17.59 − 16 =
  18. 18.285 − 16 =
  19. 19.559 − 68 =
  20. 20.492 − 37 =
  21. 21.452 − 68 =
  22. 22.401 − 49 =
  23. 23.389 − 39 =
  24. 24.382 − 48 =
  25. 25.231 − 48 =
  26. 26.182 − 96 =
  27. 27.336 − 49 =
  28. 28.376 − 58 =
  29. 29.56 − 29 =
  30. 30.443 − 66 =
  31. 31.155 − 16 =
  32. 32.320 − 68 =
  33. 33.255 − 26 =
  34. 34.544 − 66 =
  35. 35.486 − 56 =
  36. 36.83 − 38 =
  37. 37.170 − 56 =
  38. 38.230 − 78 =
  39. 39.455 − 36 =
  40. 40.419 − 47 =

Answer key

  1. 289
  2. 421
  3. 237
  4. 544
  5. 282
  6. 402
  7. 257
  8. 22
  9. 62
  10. 338
  11. 443
  12. 529
  13. 405
  14. 72
  15. 42
  16. 367
  17. 43
  18. 269
  19. 491
  20. 455
  21. 384
  22. 352
  23. 350
  24. 334
  25. 183
  26. 86
  27. 287
  28. 318
  29. 27
  30. 377
  31. 139
  32. 252
  33. 229
  34. 478
  35. 430
  36. 45
  37. 114
  38. 152
  39. 419
  40. 372

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