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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 518 · 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. 1.153 − 48 =
  2. 2.378 − 36 =
  3. 3.119 − 38 =
  4. 4.228 − 66 =
  5. 5.339 − 58 =
  6. 6.201 − 29 =
  7. 7.505 − 46 =
  8. 8.202 − 69 =
  9. 9.207 − 46 =
  10. 10.304 − 29 =
  11. 11.484 − 39 =
  12. 12.153 − 76 =
  13. 13.582 − 67 =
  14. 14.209 − 17 =
  15. 15.456 − 47 =
  16. 16.379 − 29 =
  17. 17.538 − 69 =
  18. 18.426 − 16 =
  19. 19.282 − 56 =
  20. 20.454 − 88 =
  21. 21.316 − 16 =
  22. 22.117 − 68 =
  23. 23.519 − 37 =
  24. 24.341 − 27 =
  25. 25.342 − 67 =
  26. 26.252 − 27 =
  27. 27.567 − 26 =
  28. 28.144 − 66 =
  29. 29.480 − 36 =
  30. 30.448 − 96 =
  31. 31.76 − 59 =
  32. 32.500 − 37 =
  33. 33.64 − 46 =
  34. 34.400 − 96 =
  35. 35.97 − 28 =
  36. 36.207 − 17 =
  37. 37.298 − 17 =
  38. 38.139 − 98 =
  39. 39.276 − 48 =
  40. 40.483 − 56 =

Answer key

  1. 105
  2. 342
  3. 81
  4. 162
  5. 281
  6. 172
  7. 459
  8. 133
  9. 161
  10. 275
  11. 445
  12. 77
  13. 515
  14. 192
  15. 409
  16. 350
  17. 469
  18. 410
  19. 226
  20. 366
  21. 300
  22. 49
  23. 482
  24. 314
  25. 275
  26. 225
  27. 541
  28. 78
  29. 444
  30. 352
  31. 17
  32. 463
  33. 18
  34. 304
  35. 69
  36. 190
  37. 281
  38. 41
  39. 228
  40. 427

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