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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 895 · 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. 1.397 − 69 =
  2. 2.89 − 47 =
  3. 3.474 − 26 =
  4. 4.397 − 57 =
  5. 5.348 − 16 =
  6. 6.129 − 19 =
  7. 7.314 − 28 =
  8. 8.98 − 78 =
  9. 9.90 − 18 =
  10. 10.461 − 79 =
  11. 11.475 − 26 =
  12. 12.412 − 19 =
  13. 13.396 − 46 =
  14. 14.272 − 56 =
  15. 15.483 − 19 =
  16. 16.428 − 98 =
  17. 17.97 − 36 =
  18. 18.274 − 27 =
  19. 19.584 − 58 =
  20. 20.557 − 99 =
  21. 21.340 − 36 =
  22. 22.140 − 46 =
  23. 23.141 − 67 =
  24. 24.352 − 27 =
  25. 25.531 − 98 =
  26. 26.393 − 16 =
  27. 27.133 − 38 =
  28. 28.434 − 69 =
  29. 29.232 − 77 =
  30. 30.560 − 68 =
  31. 31.523 − 99 =
  32. 32.359 − 69 =
  33. 33.448 − 18 =
  34. 34.291 − 76 =
  35. 35.433 − 68 =
  36. 36.412 − 39 =
  37. 37.532 − 97 =
  38. 38.292 − 66 =
  39. 39.413 − 29 =
  40. 40.557 − 69 =

Answer key

  1. 328
  2. 42
  3. 448
  4. 340
  5. 332
  6. 110
  7. 286
  8. 20
  9. 72
  10. 382
  11. 449
  12. 393
  13. 350
  14. 216
  15. 464
  16. 330
  17. 61
  18. 247
  19. 526
  20. 458
  21. 304
  22. 94
  23. 74
  24. 325
  25. 433
  26. 377
  27. 95
  28. 365
  29. 155
  30. 492
  31. 424
  32. 290
  33. 430
  34. 215
  35. 365
  36. 373
  37. 435
  38. 226
  39. 384
  40. 488

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