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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 192 · 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. 1.63 − 29 =
  2. 2.397 − 28 =
  3. 3.397 − 49 =
  4. 4.573 − 77 =
  5. 5.73 − 69 =
  6. 6.160 − 49 =
  7. 7.208 − 56 =
  8. 8.594 − 17 =
  9. 9.209 − 46 =
  10. 10.113 − 19 =
  11. 11.256 − 77 =
  12. 12.528 − 17 =
  13. 13.140 − 47 =
  14. 14.276 − 78 =
  15. 15.391 − 96 =
  16. 16.546 − 36 =
  17. 17.114 − 89 =
  18. 18.420 − 36 =
  19. 19.173 − 96 =
  20. 20.154 − 49 =
  21. 21.278 − 48 =
  22. 22.339 − 26 =
  23. 23.84 − 56 =
  24. 24.317 − 86 =
  25. 25.269 − 37 =
  26. 26.174 − 89 =
  27. 27.152 − 68 =
  28. 28.267 − 17 =
  29. 29.79 − 26 =
  30. 30.213 − 68 =
  31. 31.443 − 17 =
  32. 32.182 − 26 =
  33. 33.113 − 88 =
  34. 34.371 − 48 =
  35. 35.237 − 16 =
  36. 36.353 − 76 =
  37. 37.97 − 46 =
  38. 38.223 − 48 =
  39. 39.499 − 39 =
  40. 40.553 − 27 =

Answer key

  1. 34
  2. 369
  3. 348
  4. 496
  5. 4
  6. 111
  7. 152
  8. 577
  9. 163
  10. 94
  11. 179
  12. 511
  13. 93
  14. 198
  15. 295
  16. 510
  17. 25
  18. 384
  19. 77
  20. 105
  21. 230
  22. 313
  23. 28
  24. 231
  25. 232
  26. 85
  27. 84
  28. 250
  29. 53
  30. 145
  31. 426
  32. 156
  33. 25
  34. 323
  35. 221
  36. 277
  37. 51
  38. 175
  39. 460
  40. 526

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