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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 735 · 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. 1.371 − 77 =
  2. 2.542 − 16 =
  3. 3.438 − 18 =
  4. 4.237 − 29 =
  5. 5.468 − 79 =
  6. 6.339 − 58 =
  7. 7.102 − 99 =
  8. 8.305 − 28 =
  9. 9.418 − 16 =
  10. 10.57 − 36 =
  11. 11.318 − 68 =
  12. 12.370 − 47 =
  13. 13.137 − 66 =
  14. 14.193 − 77 =
  15. 15.362 − 39 =
  16. 16.156 − 17 =
  17. 17.204 − 47 =
  18. 18.551 − 19 =
  19. 19.182 − 17 =
  20. 20.105 − 36 =
  21. 21.79 − 57 =
  22. 22.135 − 36 =
  23. 23.270 − 96 =
  24. 24.92 − 49 =
  25. 25.294 − 69 =
  26. 26.258 − 39 =
  27. 27.192 − 26 =
  28. 28.197 − 38 =
  29. 29.489 − 26 =
  30. 30.396 − 88 =
  31. 31.97 − 29 =
  32. 32.597 − 18 =
  33. 33.322 − 77 =
  34. 34.310 − 67 =
  35. 35.221 − 89 =
  36. 36.350 − 16 =
  37. 37.410 − 97 =
  38. 38.141 − 58 =
  39. 39.548 − 86 =
  40. 40.214 − 19 =

Answer key

  1. 294
  2. 526
  3. 420
  4. 208
  5. 389
  6. 281
  7. 3
  8. 277
  9. 402
  10. 21
  11. 250
  12. 323
  13. 71
  14. 116
  15. 323
  16. 139
  17. 157
  18. 532
  19. 165
  20. 69
  21. 22
  22. 99
  23. 174
  24. 43
  25. 225
  26. 219
  27. 166
  28. 159
  29. 463
  30. 308
  31. 68
  32. 579
  33. 245
  34. 243
  35. 132
  36. 334
  37. 313
  38. 83
  39. 462
  40. 195

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