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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 218 · 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. 1.580 − 16 =
  2. 2.495 − 59 =
  3. 3.313 − 76 =
  4. 4.413 − 29 =
  5. 5.318 − 47 =
  6. 6.532 − 56 =
  7. 7.136 − 87 =
  8. 8.108 − 76 =
  9. 9.247 − 16 =
  10. 10.393 − 98 =
  11. 11.100 − 48 =
  12. 12.97 − 49 =
  13. 13.178 − 17 =
  14. 14.490 − 17 =
  15. 15.152 − 66 =
  16. 16.87 − 78 =
  17. 17.138 − 57 =
  18. 18.172 − 58 =
  19. 19.369 − 18 =
  20. 20.263 − 69 =
  21. 21.488 − 27 =
  22. 22.249 − 26 =
  23. 23.510 − 89 =
  24. 24.543 − 47 =
  25. 25.209 − 39 =
  26. 26.236 − 98 =
  27. 27.480 − 37 =
  28. 28.101 − 39 =
  29. 29.76 − 57 =
  30. 30.436 − 78 =
  31. 31.340 − 66 =
  32. 32.563 − 39 =
  33. 33.53 − 48 =
  34. 34.497 − 79 =
  35. 35.370 − 76 =
  36. 36.262 − 19 =
  37. 37.414 − 89 =
  38. 38.543 − 18 =
  39. 39.370 − 98 =
  40. 40.529 − 27 =

Answer key

  1. 564
  2. 436
  3. 237
  4. 384
  5. 271
  6. 476
  7. 49
  8. 32
  9. 231
  10. 295
  11. 52
  12. 48
  13. 161
  14. 473
  15. 86
  16. 9
  17. 81
  18. 114
  19. 351
  20. 194
  21. 461
  22. 223
  23. 421
  24. 496
  25. 170
  26. 138
  27. 443
  28. 62
  29. 19
  30. 358
  31. 274
  32. 524
  33. 5
  34. 418
  35. 294
  36. 243
  37. 325
  38. 525
  39. 272
  40. 502

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