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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 976 · 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. 1.234 − 99 =
  2. 2.152 − 26 =
  3. 3.207 − 18 =
  4. 4.323 − 96 =
  5. 5.423 − 99 =
  6. 6.159 − 17 =
  7. 7.505 − 17 =
  8. 8.119 − 76 =
  9. 9.357 − 19 =
  10. 10.71 − 48 =
  11. 11.383 − 66 =
  12. 12.161 − 67 =
  13. 13.206 − 27 =
  14. 14.275 − 16 =
  15. 15.63 − 49 =
  16. 16.365 − 27 =
  17. 17.90 − 69 =
  18. 18.123 − 36 =
  19. 19.277 − 38 =
  20. 20.97 − 88 =
  21. 21.213 − 89 =
  22. 22.65 − 56 =
  23. 23.245 − 68 =
  24. 24.293 − 57 =
  25. 25.255 − 38 =
  26. 26.319 − 68 =
  27. 27.256 − 29 =
  28. 28.507 − 87 =
  29. 29.425 − 16 =
  30. 30.136 − 58 =
  31. 31.470 − 86 =
  32. 32.417 − 96 =
  33. 33.232 − 37 =
  34. 34.589 − 76 =
  35. 35.343 − 56 =
  36. 36.523 − 47 =
  37. 37.52 − 47 =
  38. 38.167 − 68 =
  39. 39.315 − 96 =
  40. 40.553 − 87 =

Answer key

  1. 135
  2. 126
  3. 189
  4. 227
  5. 324
  6. 142
  7. 488
  8. 43
  9. 338
  10. 23
  11. 317
  12. 94
  13. 179
  14. 259
  15. 14
  16. 338
  17. 21
  18. 87
  19. 239
  20. 9
  21. 124
  22. 9
  23. 177
  24. 236
  25. 217
  26. 251
  27. 227
  28. 420
  29. 409
  30. 78
  31. 384
  32. 321
  33. 195
  34. 513
  35. 287
  36. 476
  37. 5
  38. 99
  39. 219
  40. 466

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