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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 640 · 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. 1.484 − 77 =
  2. 2.594 − 56 =
  3. 3.464 − 88 =
  4. 4.113 − 58 =
  5. 5.383 − 37 =
  6. 6.131 − 86 =
  7. 7.185 − 16 =
  8. 8.519 − 88 =
  9. 9.350 − 37 =
  10. 10.551 − 97 =
  11. 11.152 − 56 =
  12. 12.185 − 46 =
  13. 13.545 − 49 =
  14. 14.456 − 26 =
  15. 15.160 − 87 =
  16. 16.153 − 67 =
  17. 17.493 − 29 =
  18. 18.165 − 96 =
  19. 19.74 − 67 =
  20. 20.82 − 16 =
  21. 21.114 − 28 =
  22. 22.371 − 46 =
  23. 23.441 − 76 =
  24. 24.246 − 18 =
  25. 25.584 − 78 =
  26. 26.322 − 47 =
  27. 27.280 − 27 =
  28. 28.87 − 36 =
  29. 29.269 − 86 =
  30. 30.593 − 88 =
  31. 31.108 − 26 =
  32. 32.343 − 67 =
  33. 33.145 − 77 =
  34. 34.181 − 68 =
  35. 35.383 − 78 =
  36. 36.213 − 47 =
  37. 37.269 − 46 =
  38. 38.489 − 39 =
  39. 39.115 − 37 =
  40. 40.344 − 58 =

Answer key

  1. 407
  2. 538
  3. 376
  4. 55
  5. 346
  6. 45
  7. 169
  8. 431
  9. 313
  10. 454
  11. 96
  12. 139
  13. 496
  14. 430
  15. 73
  16. 86
  17. 464
  18. 69
  19. 7
  20. 66
  21. 86
  22. 325
  23. 365
  24. 228
  25. 506
  26. 275
  27. 253
  28. 51
  29. 183
  30. 505
  31. 82
  32. 276
  33. 68
  34. 113
  35. 305
  36. 166
  37. 223
  38. 450
  39. 78
  40. 286

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