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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 741 · 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. 1.288 − 28 =
  2. 2.117 − 68 =
  3. 3.379 − 49 =
  4. 4.550 − 39 =
  5. 5.108 − 76 =
  6. 6.69 − 37 =
  7. 7.238 − 96 =
  8. 8.312 − 88 =
  9. 9.468 − 67 =
  10. 10.187 − 37 =
  11. 11.177 − 39 =
  12. 12.549 − 88 =
  13. 13.556 − 98 =
  14. 14.94 − 76 =
  15. 15.195 − 39 =
  16. 16.348 − 97 =
  17. 17.559 − 66 =
  18. 18.235 − 18 =
  19. 19.505 − 58 =
  20. 20.148 − 57 =
  21. 21.442 − 28 =
  22. 22.212 − 39 =
  23. 23.240 − 46 =
  24. 24.275 − 76 =
  25. 25.473 − 38 =
  26. 26.152 − 96 =
  27. 27.90 − 67 =
  28. 28.96 − 36 =
  29. 29.343 − 39 =
  30. 30.289 − 26 =
  31. 31.196 − 26 =
  32. 32.479 − 89 =
  33. 33.428 − 39 =
  34. 34.139 − 77 =
  35. 35.256 − 57 =
  36. 36.561 − 57 =
  37. 37.394 − 97 =
  38. 38.179 − 67 =
  39. 39.325 − 16 =
  40. 40.61 − 47 =

Answer key

  1. 260
  2. 49
  3. 330
  4. 511
  5. 32
  6. 32
  7. 142
  8. 224
  9. 401
  10. 150
  11. 138
  12. 461
  13. 458
  14. 18
  15. 156
  16. 251
  17. 493
  18. 217
  19. 447
  20. 91
  21. 414
  22. 173
  23. 194
  24. 199
  25. 435
  26. 56
  27. 23
  28. 60
  29. 304
  30. 263
  31. 170
  32. 390
  33. 389
  34. 62
  35. 199
  36. 504
  37. 297
  38. 112
  39. 309
  40. 14

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