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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 327 · 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. 1.384 − 76 =
  2. 2.359 − 38 =
  3. 3.525 − 28 =
  4. 4.52 − 46 =
  5. 5.126 − 76 =
  6. 6.115 − 29 =
  7. 7.403 − 98 =
  8. 8.158 − 66 =
  9. 9.503 − 86 =
  10. 10.476 − 58 =
  11. 11.335 − 58 =
  12. 12.170 − 96 =
  13. 13.370 − 89 =
  14. 14.244 − 46 =
  15. 15.85 − 78 =
  16. 16.87 − 37 =
  17. 17.404 − 78 =
  18. 18.158 − 77 =
  19. 19.308 − 78 =
  20. 20.96 − 18 =
  21. 21.52 − 28 =
  22. 22.206 − 78 =
  23. 23.281 − 68 =
  24. 24.180 − 79 =
  25. 25.499 − 86 =
  26. 26.172 − 89 =
  27. 27.281 − 99 =
  28. 28.515 − 86 =
  29. 29.181 − 79 =
  30. 30.350 − 86 =
  31. 31.298 − 48 =
  32. 32.265 − 17 =
  33. 33.199 − 69 =
  34. 34.73 − 47 =
  35. 35.88 − 46 =
  36. 36.351 − 88 =
  37. 37.343 − 96 =
  38. 38.284 − 96 =
  39. 39.73 − 68 =
  40. 40.578 − 99 =

Answer key

  1. 308
  2. 321
  3. 497
  4. 6
  5. 50
  6. 86
  7. 305
  8. 92
  9. 417
  10. 418
  11. 277
  12. 74
  13. 281
  14. 198
  15. 7
  16. 50
  17. 326
  18. 81
  19. 230
  20. 78
  21. 24
  22. 128
  23. 213
  24. 101
  25. 413
  26. 83
  27. 182
  28. 429
  29. 102
  30. 264
  31. 250
  32. 248
  33. 130
  34. 26
  35. 42
  36. 263
  37. 247
  38. 188
  39. 5
  40. 479

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