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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 302 · 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. 1.273 − 39 =
  2. 2.404 − 39 =
  3. 3.148 − 39 =
  4. 4.448 − 36 =
  5. 5.500 − 39 =
  6. 6.156 − 79 =
  7. 7.356 − 56 =
  8. 8.110 − 47 =
  9. 9.477 − 58 =
  10. 10.395 − 16 =
  11. 11.336 − 98 =
  12. 12.501 − 78 =
  13. 13.119 − 29 =
  14. 14.397 − 39 =
  15. 15.479 − 79 =
  16. 16.274 − 97 =
  17. 17.279 − 99 =
  18. 18.586 − 56 =
  19. 19.202 − 57 =
  20. 20.257 − 79 =
  21. 21.417 − 59 =
  22. 22.331 − 56 =
  23. 23.340 − 38 =
  24. 24.385 − 36 =
  25. 25.131 − 28 =
  26. 26.388 − 76 =
  27. 27.252 − 86 =
  28. 28.422 − 77 =
  29. 29.150 − 27 =
  30. 30.391 − 56 =
  31. 31.194 − 97 =
  32. 32.262 − 56 =
  33. 33.420 − 29 =
  34. 34.581 − 38 =
  35. 35.274 − 59 =
  36. 36.328 − 19 =
  37. 37.416 − 96 =
  38. 38.485 − 39 =
  39. 39.176 − 97 =
  40. 40.141 − 69 =

Answer key

  1. 234
  2. 365
  3. 109
  4. 412
  5. 461
  6. 77
  7. 300
  8. 63
  9. 419
  10. 379
  11. 238
  12. 423
  13. 90
  14. 358
  15. 400
  16. 177
  17. 180
  18. 530
  19. 145
  20. 178
  21. 358
  22. 275
  23. 302
  24. 349
  25. 103
  26. 312
  27. 166
  28. 345
  29. 123
  30. 335
  31. 97
  32. 206
  33. 391
  34. 543
  35. 215
  36. 309
  37. 320
  38. 446
  39. 79
  40. 72

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