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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 716 · 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. 1.119 − 37 =
  2. 2.334 − 66 =
  3. 3.498 − 77 =
  4. 4.248 − 47 =
  5. 5.69 − 27 =
  6. 6.98 − 38 =
  7. 7.89 − 29 =
  8. 8.469 − 78 =
  9. 9.394 − 86 =
  10. 10.68 − 66 =
  11. 11.150 − 96 =
  12. 12.291 − 46 =
  13. 13.255 − 57 =
  14. 14.162 − 16 =
  15. 15.432 − 98 =
  16. 16.448 − 38 =
  17. 17.452 − 29 =
  18. 18.145 − 37 =
  19. 19.546 − 39 =
  20. 20.355 − 16 =
  21. 21.163 − 88 =
  22. 22.193 − 29 =
  23. 23.233 − 26 =
  24. 24.206 − 39 =
  25. 25.73 − 38 =
  26. 26.493 − 57 =
  27. 27.117 − 86 =
  28. 28.368 − 89 =
  29. 29.294 − 67 =
  30. 30.227 − 69 =
  31. 31.397 − 57 =
  32. 32.79 − 36 =
  33. 33.342 − 16 =
  34. 34.196 − 19 =
  35. 35.400 − 66 =
  36. 36.276 − 87 =
  37. 37.558 − 36 =
  38. 38.465 − 28 =
  39. 39.571 − 39 =
  40. 40.327 − 97 =

Answer key

  1. 82
  2. 268
  3. 421
  4. 201
  5. 42
  6. 60
  7. 60
  8. 391
  9. 308
  10. 2
  11. 54
  12. 245
  13. 198
  14. 146
  15. 334
  16. 410
  17. 423
  18. 108
  19. 507
  20. 339
  21. 75
  22. 164
  23. 207
  24. 167
  25. 35
  26. 436
  27. 31
  28. 279
  29. 227
  30. 158
  31. 340
  32. 43
  33. 326
  34. 177
  35. 334
  36. 189
  37. 522
  38. 437
  39. 532
  40. 230

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