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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 483 · 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. 1.482 − 97 =
  2. 2.211 − 67 =
  3. 3.282 − 89 =
  4. 4.52 − 17 =
  5. 5.58 − 19 =
  6. 6.215 − 99 =
  7. 7.202 − 17 =
  8. 8.410 − 87 =
  9. 9.560 − 36 =
  10. 10.148 − 66 =
  11. 11.169 − 48 =
  12. 12.390 − 59 =
  13. 13.492 − 37 =
  14. 14.249 − 36 =
  15. 15.157 − 27 =
  16. 16.434 − 67 =
  17. 17.185 − 77 =
  18. 18.590 − 36 =
  19. 19.168 − 99 =
  20. 20.457 − 26 =
  21. 21.252 − 67 =
  22. 22.435 − 46 =
  23. 23.528 − 38 =
  24. 24.583 − 97 =
  25. 25.77 − 18 =
  26. 26.296 − 69 =
  27. 27.377 − 76 =
  28. 28.350 − 96 =
  29. 29.280 − 49 =
  30. 30.551 − 86 =
  31. 31.519 − 36 =
  32. 32.358 − 59 =
  33. 33.187 − 66 =
  34. 34.532 − 68 =
  35. 35.267 − 66 =
  36. 36.121 − 96 =
  37. 37.208 − 47 =
  38. 38.97 − 86 =
  39. 39.486 − 19 =
  40. 40.176 − 46 =

Answer key

  1. 385
  2. 144
  3. 193
  4. 35
  5. 39
  6. 116
  7. 185
  8. 323
  9. 524
  10. 82
  11. 121
  12. 331
  13. 455
  14. 213
  15. 130
  16. 367
  17. 108
  18. 554
  19. 69
  20. 431
  21. 185
  22. 389
  23. 490
  24. 486
  25. 59
  26. 227
  27. 301
  28. 254
  29. 231
  30. 465
  31. 483
  32. 299
  33. 121
  34. 464
  35. 201
  36. 25
  37. 161
  38. 11
  39. 467
  40. 130

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