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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 132 · 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. 1.285 − 16 =
  2. 2.310 − 49 =
  3. 3.458 − 29 =
  4. 4.478 − 29 =
  5. 5.345 − 16 =
  6. 6.111 − 78 =
  7. 7.87 − 57 =
  8. 8.183 − 96 =
  9. 9.165 − 36 =
  10. 10.568 − 18 =
  11. 11.545 − 79 =
  12. 12.336 − 46 =
  13. 13.92 − 86 =
  14. 14.78 − 17 =
  15. 15.415 − 88 =
  16. 16.334 − 47 =
  17. 17.483 − 26 =
  18. 18.493 − 19 =
  19. 19.279 − 27 =
  20. 20.183 − 39 =
  21. 21.471 − 46 =
  22. 22.522 − 18 =
  23. 23.245 − 49 =
  24. 24.280 − 39 =
  25. 25.154 − 78 =
  26. 26.130 − 46 =
  27. 27.311 − 88 =
  28. 28.140 − 16 =
  29. 29.125 − 86 =
  30. 30.155 − 37 =
  31. 31.323 − 67 =
  32. 32.473 − 29 =
  33. 33.259 − 46 =
  34. 34.381 − 96 =
  35. 35.189 − 27 =
  36. 36.107 − 18 =
  37. 37.206 − 26 =
  38. 38.267 − 26 =
  39. 39.106 − 67 =
  40. 40.158 − 56 =

Answer key

  1. 269
  2. 261
  3. 429
  4. 449
  5. 329
  6. 33
  7. 30
  8. 87
  9. 129
  10. 550
  11. 466
  12. 290
  13. 6
  14. 61
  15. 327
  16. 287
  17. 457
  18. 474
  19. 252
  20. 144
  21. 425
  22. 504
  23. 196
  24. 241
  25. 76
  26. 84
  27. 223
  28. 124
  29. 39
  30. 118
  31. 256
  32. 444
  33. 213
  34. 285
  35. 162
  36. 89
  37. 180
  38. 241
  39. 39
  40. 102

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