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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 886 · 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. 1.393 − 59 =
  2. 2.320 − 97 =
  3. 3.311 − 89 =
  4. 4.111 − 79 =
  5. 5.157 − 48 =
  6. 6.105 − 56 =
  7. 7.279 − 78 =
  8. 8.236 − 18 =
  9. 9.444 − 18 =
  10. 10.465 − 99 =
  11. 11.565 − 97 =
  12. 12.183 − 19 =
  13. 13.431 − 97 =
  14. 14.345 − 67 =
  15. 15.414 − 67 =
  16. 16.87 − 27 =
  17. 17.484 − 29 =
  18. 18.499 − 47 =
  19. 19.315 − 49 =
  20. 20.400 − 96 =
  21. 21.53 − 28 =
  22. 22.429 − 56 =
  23. 23.132 − 48 =
  24. 24.196 − 89 =
  25. 25.299 − 86 =
  26. 26.304 − 68 =
  27. 27.199 − 37 =
  28. 28.234 − 28 =
  29. 29.312 − 29 =
  30. 30.448 − 57 =
  31. 31.204 − 57 =
  32. 32.497 − 78 =
  33. 33.88 − 26 =
  34. 34.204 − 46 =
  35. 35.567 − 57 =
  36. 36.339 − 98 =
  37. 37.326 − 26 =
  38. 38.468 − 79 =
  39. 39.395 − 66 =
  40. 40.285 − 28 =

Answer key

  1. 334
  2. 223
  3. 222
  4. 32
  5. 109
  6. 49
  7. 201
  8. 218
  9. 426
  10. 366
  11. 468
  12. 164
  13. 334
  14. 278
  15. 347
  16. 60
  17. 455
  18. 452
  19. 266
  20. 304
  21. 25
  22. 373
  23. 84
  24. 107
  25. 213
  26. 236
  27. 162
  28. 206
  29. 283
  30. 391
  31. 147
  32. 419
  33. 62
  34. 158
  35. 510
  36. 241
  37. 300
  38. 389
  39. 329
  40. 257

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