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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 375 · 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. 1.138 − 99 =
  2. 2.282 − 89 =
  3. 3.342 − 36 =
  4. 4.149 − 97 =
  5. 5.476 − 97 =
  6. 6.248 − 47 =
  7. 7.554 − 47 =
  8. 8.314 − 78 =
  9. 9.425 − 88 =
  10. 10.213 − 76 =
  11. 11.435 − 38 =
  12. 12.293 − 89 =
  13. 13.290 − 56 =
  14. 14.195 − 56 =
  15. 15.144 − 77 =
  16. 16.421 − 26 =
  17. 17.168 − 28 =
  18. 18.154 − 76 =
  19. 19.472 − 27 =
  20. 20.115 − 88 =
  21. 21.395 − 16 =
  22. 22.87 − 69 =
  23. 23.242 − 77 =
  24. 24.194 − 36 =
  25. 25.386 − 66 =
  26. 26.88 − 26 =
  27. 27.324 − 77 =
  28. 28.550 − 57 =
  29. 29.593 − 19 =
  30. 30.548 − 37 =
  31. 31.211 − 96 =
  32. 32.323 − 18 =
  33. 33.522 − 67 =
  34. 34.100 − 69 =
  35. 35.226 − 56 =
  36. 36.489 − 26 =
  37. 37.153 − 58 =
  38. 38.201 − 56 =
  39. 39.444 − 66 =
  40. 40.485 − 86 =

Answer key

  1. 39
  2. 193
  3. 306
  4. 52
  5. 379
  6. 201
  7. 507
  8. 236
  9. 337
  10. 137
  11. 397
  12. 204
  13. 234
  14. 139
  15. 67
  16. 395
  17. 140
  18. 78
  19. 445
  20. 27
  21. 379
  22. 18
  23. 165
  24. 158
  25. 320
  26. 62
  27. 247
  28. 493
  29. 574
  30. 511
  31. 115
  32. 305
  33. 455
  34. 31
  35. 170
  36. 463
  37. 95
  38. 145
  39. 378
  40. 399

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