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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 273 · 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. 1.402 − 26 =
  2. 2.142 − 88 =
  3. 3.382 − 36 =
  4. 4.231 − 87 =
  5. 5.82 − 46 =
  6. 6.579 − 99 =
  7. 7.591 − 37 =
  8. 8.211 − 57 =
  9. 9.219 − 28 =
  10. 10.316 − 38 =
  11. 11.530 − 18 =
  12. 12.153 − 89 =
  13. 13.458 − 87 =
  14. 14.102 − 67 =
  15. 15.58 − 29 =
  16. 16.167 − 76 =
  17. 17.511 − 28 =
  18. 18.287 − 16 =
  19. 19.482 − 26 =
  20. 20.458 − 46 =
  21. 21.384 − 79 =
  22. 22.538 − 36 =
  23. 23.488 − 28 =
  24. 24.327 − 16 =
  25. 25.150 − 96 =
  26. 26.292 − 27 =
  27. 27.214 − 67 =
  28. 28.88 − 57 =
  29. 29.515 − 99 =
  30. 30.61 − 46 =
  31. 31.75 − 48 =
  32. 32.323 − 39 =
  33. 33.203 − 18 =
  34. 34.207 − 38 =
  35. 35.256 − 56 =
  36. 36.311 − 89 =
  37. 37.389 − 58 =
  38. 38.256 − 17 =
  39. 39.189 − 36 =
  40. 40.374 − 18 =

Answer key

  1. 376
  2. 54
  3. 346
  4. 144
  5. 36
  6. 480
  7. 554
  8. 154
  9. 191
  10. 278
  11. 512
  12. 64
  13. 371
  14. 35
  15. 29
  16. 91
  17. 483
  18. 271
  19. 456
  20. 412
  21. 305
  22. 502
  23. 460
  24. 311
  25. 54
  26. 265
  27. 147
  28. 31
  29. 416
  30. 15
  31. 27
  32. 284
  33. 185
  34. 169
  35. 200
  36. 222
  37. 331
  38. 239
  39. 153
  40. 356

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