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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 497 · 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. 1.266 − 37 =
  2. 2.230 − 39 =
  3. 3.271 − 48 =
  4. 4.374 − 49 =
  5. 5.283 − 36 =
  6. 6.400 − 59 =
  7. 7.318 − 59 =
  8. 8.193 − 87 =
  9. 9.315 − 87 =
  10. 10.153 − 59 =
  11. 11.560 − 79 =
  12. 12.157 − 96 =
  13. 13.147 − 17 =
  14. 14.178 − 86 =
  15. 15.495 − 68 =
  16. 16.67 − 38 =
  17. 17.288 − 68 =
  18. 18.104 − 36 =
  19. 19.411 − 97 =
  20. 20.446 − 77 =
  21. 21.363 − 68 =
  22. 22.166 − 77 =
  23. 23.156 − 56 =
  24. 24.215 − 96 =
  25. 25.171 − 96 =
  26. 26.163 − 27 =
  27. 27.496 − 46 =
  28. 28.165 − 78 =
  29. 29.530 − 27 =
  30. 30.247 − 56 =
  31. 31.478 − 27 =
  32. 32.366 − 19 =
  33. 33.93 − 86 =
  34. 34.518 − 67 =
  35. 35.492 − 77 =
  36. 36.395 − 39 =
  37. 37.187 − 66 =
  38. 38.206 − 66 =
  39. 39.167 − 18 =
  40. 40.433 − 96 =

Answer key

  1. 229
  2. 191
  3. 223
  4. 325
  5. 247
  6. 341
  7. 259
  8. 106
  9. 228
  10. 94
  11. 481
  12. 61
  13. 130
  14. 92
  15. 427
  16. 29
  17. 220
  18. 68
  19. 314
  20. 369
  21. 295
  22. 89
  23. 100
  24. 119
  25. 75
  26. 136
  27. 450
  28. 87
  29. 503
  30. 191
  31. 451
  32. 347
  33. 7
  34. 451
  35. 415
  36. 356
  37. 121
  38. 140
  39. 149
  40. 337

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