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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 862 · 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. 1.480 − 67 =
  2. 2.168 − 49 =
  3. 3.346 − 29 =
  4. 4.397 − 18 =
  5. 5.146 − 17 =
  6. 6.274 − 47 =
  7. 7.247 − 96 =
  8. 8.309 − 37 =
  9. 9.207 − 86 =
  10. 10.422 − 89 =
  11. 11.113 − 59 =
  12. 12.529 − 16 =
  13. 13.472 − 47 =
  14. 14.155 − 49 =
  15. 15.155 − 68 =
  16. 16.145 − 26 =
  17. 17.243 − 36 =
  18. 18.191 − 28 =
  19. 19.114 − 69 =
  20. 20.293 − 89 =
  21. 21.170 − 97 =
  22. 22.293 − 19 =
  23. 23.88 − 46 =
  24. 24.102 − 86 =
  25. 25.589 − 46 =
  26. 26.329 − 46 =
  27. 27.479 − 86 =
  28. 28.429 − 49 =
  29. 29.526 − 96 =
  30. 30.303 − 47 =
  31. 31.572 − 67 =
  32. 32.347 − 29 =
  33. 33.365 − 16 =
  34. 34.563 − 66 =
  35. 35.158 − 56 =
  36. 36.425 − 58 =
  37. 37.112 − 78 =
  38. 38.198 − 27 =
  39. 39.453 − 77 =
  40. 40.102 − 49 =

Answer key

  1. 413
  2. 119
  3. 317
  4. 379
  5. 129
  6. 227
  7. 151
  8. 272
  9. 121
  10. 333
  11. 54
  12. 513
  13. 425
  14. 106
  15. 87
  16. 119
  17. 207
  18. 163
  19. 45
  20. 204
  21. 73
  22. 274
  23. 42
  24. 16
  25. 543
  26. 283
  27. 393
  28. 380
  29. 430
  30. 256
  31. 505
  32. 318
  33. 349
  34. 497
  35. 102
  36. 367
  37. 34
  38. 171
  39. 376
  40. 53

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