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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 872 · 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. 1.121 − 76 =
  2. 2.289 − 76 =
  3. 3.280 − 17 =
  4. 4.527 − 58 =
  5. 5.579 − 97 =
  6. 6.259 − 19 =
  7. 7.378 − 58 =
  8. 8.362 − 88 =
  9. 9.187 − 87 =
  10. 10.193 − 38 =
  11. 11.208 − 28 =
  12. 12.138 − 47 =
  13. 13.506 − 27 =
  14. 14.499 − 46 =
  15. 15.476 − 16 =
  16. 16.97 − 27 =
  17. 17.512 − 76 =
  18. 18.360 − 78 =
  19. 19.372 − 27 =
  20. 20.292 − 19 =
  21. 21.270 − 79 =
  22. 22.455 − 99 =
  23. 23.562 − 28 =
  24. 24.105 − 46 =
  25. 25.416 − 57 =
  26. 26.495 − 77 =
  27. 27.198 − 98 =
  28. 28.431 − 46 =
  29. 29.236 − 98 =
  30. 30.277 − 56 =
  31. 31.483 − 56 =
  32. 32.505 − 27 =
  33. 33.202 − 76 =
  34. 34.189 − 67 =
  35. 35.306 − 29 =
  36. 36.208 − 88 =
  37. 37.395 − 36 =
  38. 38.241 − 76 =
  39. 39.241 − 17 =
  40. 40.463 − 17 =

Answer key

  1. 45
  2. 213
  3. 263
  4. 469
  5. 482
  6. 240
  7. 320
  8. 274
  9. 100
  10. 155
  11. 180
  12. 91
  13. 479
  14. 453
  15. 460
  16. 70
  17. 436
  18. 282
  19. 345
  20. 273
  21. 191
  22. 356
  23. 534
  24. 59
  25. 359
  26. 418
  27. 100
  28. 385
  29. 138
  30. 221
  31. 427
  32. 478
  33. 126
  34. 122
  35. 277
  36. 120
  37. 359
  38. 165
  39. 224
  40. 446

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