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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 480 · 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. 1.211 − 47 =
  2. 2.115 − 98 =
  3. 3.449 − 78 =
  4. 4.516 − 88 =
  5. 5.179 − 96 =
  6. 6.324 − 99 =
  7. 7.192 − 89 =
  8. 8.352 − 26 =
  9. 9.479 − 18 =
  10. 10.515 − 98 =
  11. 11.127 − 39 =
  12. 12.124 − 88 =
  13. 13.357 − 29 =
  14. 14.570 − 87 =
  15. 15.353 − 28 =
  16. 16.467 − 66 =
  17. 17.490 − 76 =
  18. 18.534 − 58 =
  19. 19.348 − 48 =
  20. 20.157 − 88 =
  21. 21.263 − 56 =
  22. 22.324 − 76 =
  23. 23.180 − 49 =
  24. 24.188 − 77 =
  25. 25.354 − 19 =
  26. 26.154 − 76 =
  27. 27.541 − 48 =
  28. 28.231 − 48 =
  29. 29.231 − 26 =
  30. 30.217 − 99 =
  31. 31.498 − 67 =
  32. 32.326 − 99 =
  33. 33.171 − 29 =
  34. 34.550 − 28 =
  35. 35.431 − 68 =
  36. 36.232 − 16 =
  37. 37.330 − 18 =
  38. 38.527 − 37 =
  39. 39.101 − 99 =
  40. 40.259 − 27 =

Answer key

  1. 164
  2. 17
  3. 371
  4. 428
  5. 83
  6. 225
  7. 103
  8. 326
  9. 461
  10. 417
  11. 88
  12. 36
  13. 328
  14. 483
  15. 325
  16. 401
  17. 414
  18. 476
  19. 300
  20. 69
  21. 207
  22. 248
  23. 131
  24. 111
  25. 335
  26. 78
  27. 493
  28. 183
  29. 205
  30. 118
  31. 431
  32. 227
  33. 142
  34. 522
  35. 363
  36. 216
  37. 312
  38. 490
  39. 2
  40. 232

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