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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 112 · 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. 1.364 − 48 =
  2. 2.376 − 47 =
  3. 3.203 − 47 =
  4. 4.375 − 29 =
  5. 5.90 − 47 =
  6. 6.507 − 99 =
  7. 7.505 − 76 =
  8. 8.187 − 49 =
  9. 9.141 − 27 =
  10. 10.85 − 27 =
  11. 11.458 − 98 =
  12. 12.464 − 29 =
  13. 13.91 − 49 =
  14. 14.171 − 19 =
  15. 15.493 − 47 =
  16. 16.489 − 76 =
  17. 17.358 − 39 =
  18. 18.109 − 18 =
  19. 19.263 − 49 =
  20. 20.160 − 66 =
  21. 21.136 − 97 =
  22. 22.187 − 67 =
  23. 23.588 − 77 =
  24. 24.191 − 56 =
  25. 25.446 − 36 =
  26. 26.278 − 19 =
  27. 27.254 − 86 =
  28. 28.132 − 46 =
  29. 29.588 − 66 =
  30. 30.554 − 76 =
  31. 31.169 − 99 =
  32. 32.279 − 88 =
  33. 33.535 − 59 =
  34. 34.385 − 18 =
  35. 35.380 − 96 =
  36. 36.70 − 18 =
  37. 37.123 − 29 =
  38. 38.182 − 16 =
  39. 39.267 − 58 =
  40. 40.138 − 89 =

Answer key

  1. 316
  2. 329
  3. 156
  4. 346
  5. 43
  6. 408
  7. 429
  8. 138
  9. 114
  10. 58
  11. 360
  12. 435
  13. 42
  14. 152
  15. 446
  16. 413
  17. 319
  18. 91
  19. 214
  20. 94
  21. 39
  22. 120
  23. 511
  24. 135
  25. 410
  26. 259
  27. 168
  28. 86
  29. 522
  30. 478
  31. 70
  32. 191
  33. 476
  34. 367
  35. 284
  36. 52
  37. 94
  38. 166
  39. 209
  40. 49

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