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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 936 · 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. 1.265 − 66 =
  2. 2.420 − 87 =
  3. 3.497 − 58 =
  4. 4.533 − 77 =
  5. 5.61 − 28 =
  6. 6.163 − 16 =
  7. 7.315 − 87 =
  8. 8.537 − 66 =
  9. 9.503 − 46 =
  10. 10.516 − 68 =
  11. 11.202 − 96 =
  12. 12.410 − 19 =
  13. 13.494 − 58 =
  14. 14.219 − 99 =
  15. 15.420 − 68 =
  16. 16.80 − 78 =
  17. 17.452 − 16 =
  18. 18.479 − 78 =
  19. 19.153 − 99 =
  20. 20.268 − 98 =
  21. 21.515 − 26 =
  22. 22.63 − 29 =
  23. 23.304 − 19 =
  24. 24.426 − 49 =
  25. 25.350 − 26 =
  26. 26.467 − 69 =
  27. 27.435 − 18 =
  28. 28.330 − 88 =
  29. 29.548 − 37 =
  30. 30.81 − 48 =
  31. 31.140 − 26 =
  32. 32.591 − 18 =
  33. 33.192 − 99 =
  34. 34.233 − 96 =
  35. 35.526 − 16 =
  36. 36.392 − 28 =
  37. 37.91 − 69 =
  38. 38.317 − 56 =
  39. 39.384 − 69 =
  40. 40.567 − 47 =

Answer key

  1. 199
  2. 333
  3. 439
  4. 456
  5. 33
  6. 147
  7. 228
  8. 471
  9. 457
  10. 448
  11. 106
  12. 391
  13. 436
  14. 120
  15. 352
  16. 2
  17. 436
  18. 401
  19. 54
  20. 170
  21. 489
  22. 34
  23. 285
  24. 377
  25. 324
  26. 398
  27. 417
  28. 242
  29. 511
  30. 33
  31. 114
  32. 573
  33. 93
  34. 137
  35. 510
  36. 364
  37. 22
  38. 261
  39. 315
  40. 520

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