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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 599 · 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. 1.287 − 99 =
  2. 2.404 − 47 =
  3. 3.168 − 36 =
  4. 4.170 − 28 =
  5. 5.62 − 18 =
  6. 6.161 − 46 =
  7. 7.411 − 47 =
  8. 8.534 − 29 =
  9. 9.287 − 16 =
  10. 10.264 − 87 =
  11. 11.332 − 39 =
  12. 12.279 − 39 =
  13. 13.456 − 16 =
  14. 14.333 − 19 =
  15. 15.575 − 27 =
  16. 16.147 − 58 =
  17. 17.298 − 86 =
  18. 18.149 − 89 =
  19. 19.157 − 88 =
  20. 20.217 − 69 =
  21. 21.156 − 26 =
  22. 22.197 − 97 =
  23. 23.598 − 36 =
  24. 24.494 − 39 =
  25. 25.164 − 78 =
  26. 26.326 − 56 =
  27. 27.202 − 39 =
  28. 28.226 − 18 =
  29. 29.184 − 27 =
  30. 30.578 − 98 =
  31. 31.472 − 27 =
  32. 32.545 − 96 =
  33. 33.436 − 98 =
  34. 34.549 − 68 =
  35. 35.334 − 16 =
  36. 36.517 − 78 =
  37. 37.297 − 16 =
  38. 38.82 − 27 =
  39. 39.443 − 59 =
  40. 40.135 − 96 =

Answer key

  1. 188
  2. 357
  3. 132
  4. 142
  5. 44
  6. 115
  7. 364
  8. 505
  9. 271
  10. 177
  11. 293
  12. 240
  13. 440
  14. 314
  15. 548
  16. 89
  17. 212
  18. 60
  19. 69
  20. 148
  21. 130
  22. 100
  23. 562
  24. 455
  25. 86
  26. 270
  27. 163
  28. 208
  29. 157
  30. 480
  31. 445
  32. 449
  33. 338
  34. 481
  35. 318
  36. 439
  37. 281
  38. 55
  39. 384
  40. 39

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