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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 96 · 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. 1.310 − 56 =
  2. 2.198 − 58 =
  3. 3.594 − 98 =
  4. 4.570 − 28 =
  5. 5.195 − 18 =
  6. 6.220 − 89 =
  7. 7.164 − 66 =
  8. 8.457 − 87 =
  9. 9.598 − 17 =
  10. 10.276 − 18 =
  11. 11.544 − 29 =
  12. 12.312 − 18 =
  13. 13.314 − 68 =
  14. 14.153 − 96 =
  15. 15.348 − 66 =
  16. 16.142 − 87 =
  17. 17.75 − 59 =
  18. 18.102 − 37 =
  19. 19.433 − 58 =
  20. 20.406 − 77 =
  21. 21.162 − 46 =
  22. 22.331 − 49 =
  23. 23.186 − 47 =
  24. 24.571 − 46 =
  25. 25.568 − 79 =
  26. 26.426 − 76 =
  27. 27.427 − 27 =
  28. 28.118 − 19 =
  29. 29.333 − 27 =
  30. 30.81 − 27 =
  31. 31.560 − 29 =
  32. 32.510 − 76 =
  33. 33.336 − 68 =
  34. 34.515 − 79 =
  35. 35.282 − 18 =
  36. 36.279 − 68 =
  37. 37.169 − 58 =
  38. 38.277 − 98 =
  39. 39.489 − 39 =
  40. 40.548 − 87 =

Answer key

  1. 254
  2. 140
  3. 496
  4. 542
  5. 177
  6. 131
  7. 98
  8. 370
  9. 581
  10. 258
  11. 515
  12. 294
  13. 246
  14. 57
  15. 282
  16. 55
  17. 16
  18. 65
  19. 375
  20. 329
  21. 116
  22. 282
  23. 139
  24. 525
  25. 489
  26. 350
  27. 400
  28. 99
  29. 306
  30. 54
  31. 531
  32. 434
  33. 268
  34. 436
  35. 264
  36. 211
  37. 111
  38. 179
  39. 450
  40. 461

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