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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 500 · 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. 1.471 − 99 =
  2. 2.150 − 26 =
  3. 3.332 − 27 =
  4. 4.329 − 76 =
  5. 5.150 − 98 =
  6. 6.289 − 66 =
  7. 7.335 − 68 =
  8. 8.422 − 36 =
  9. 9.148 − 78 =
  10. 10.80 − 18 =
  11. 11.531 − 69 =
  12. 12.485 − 76 =
  13. 13.405 − 76 =
  14. 14.224 − 96 =
  15. 15.475 − 57 =
  16. 16.274 − 66 =
  17. 17.87 − 47 =
  18. 18.148 − 77 =
  19. 19.395 − 19 =
  20. 20.180 − 96 =
  21. 21.367 − 18 =
  22. 22.325 − 49 =
  23. 23.56 − 29 =
  24. 24.107 − 26 =
  25. 25.102 − 46 =
  26. 26.329 − 16 =
  27. 27.306 − 16 =
  28. 28.269 − 46 =
  29. 29.104 − 48 =
  30. 30.578 − 76 =
  31. 31.586 − 56 =
  32. 32.246 − 87 =
  33. 33.128 − 68 =
  34. 34.407 − 39 =
  35. 35.89 − 56 =
  36. 36.479 − 77 =
  37. 37.95 − 26 =
  38. 38.202 − 28 =
  39. 39.585 − 68 =
  40. 40.104 − 77 =

Answer key

  1. 372
  2. 124
  3. 305
  4. 253
  5. 52
  6. 223
  7. 267
  8. 386
  9. 70
  10. 62
  11. 462
  12. 409
  13. 329
  14. 128
  15. 418
  16. 208
  17. 40
  18. 71
  19. 376
  20. 84
  21. 349
  22. 276
  23. 27
  24. 81
  25. 56
  26. 313
  27. 290
  28. 223
  29. 56
  30. 502
  31. 530
  32. 159
  33. 60
  34. 368
  35. 33
  36. 402
  37. 69
  38. 174
  39. 517
  40. 27

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