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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 251 · 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. 1.261 − 48 =
  2. 2.193 − 46 =
  3. 3.508 − 39 =
  4. 4.260 − 29 =
  5. 5.161 − 67 =
  6. 6.175 − 16 =
  7. 7.390 − 49 =
  8. 8.130 − 66 =
  9. 9.487 − 47 =
  10. 10.230 − 66 =
  11. 11.443 − 18 =
  12. 12.199 − 29 =
  13. 13.329 − 26 =
  14. 14.157 − 46 =
  15. 15.526 − 56 =
  16. 16.129 − 79 =
  17. 17.150 − 68 =
  18. 18.263 − 49 =
  19. 19.168 − 98 =
  20. 20.564 − 56 =
  21. 21.395 − 37 =
  22. 22.198 − 66 =
  23. 23.318 − 49 =
  24. 24.444 − 77 =
  25. 25.380 − 46 =
  26. 26.300 − 86 =
  27. 27.241 − 58 =
  28. 28.331 − 67 =
  29. 29.189 − 99 =
  30. 30.142 − 87 =
  31. 31.252 − 38 =
  32. 32.317 − 86 =
  33. 33.214 − 97 =
  34. 34.125 − 77 =
  35. 35.174 − 87 =
  36. 36.432 − 98 =
  37. 37.306 − 87 =
  38. 38.222 − 99 =
  39. 39.260 − 58 =
  40. 40.397 − 69 =

Answer key

  1. 213
  2. 147
  3. 469
  4. 231
  5. 94
  6. 159
  7. 341
  8. 64
  9. 440
  10. 164
  11. 425
  12. 170
  13. 303
  14. 111
  15. 470
  16. 50
  17. 82
  18. 214
  19. 70
  20. 508
  21. 358
  22. 132
  23. 269
  24. 367
  25. 334
  26. 214
  27. 183
  28. 264
  29. 90
  30. 55
  31. 214
  32. 231
  33. 117
  34. 48
  35. 87
  36. 334
  37. 219
  38. 123
  39. 202
  40. 328

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