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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 546 · 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. 1.192 − 36 =
  2. 2.577 − 98 =
  3. 3.274 − 99 =
  4. 4.555 − 67 =
  5. 5.375 − 59 =
  6. 6.346 − 89 =
  7. 7.110 − 59 =
  8. 8.575 − 17 =
  9. 9.147 − 86 =
  10. 10.321 − 98 =
  11. 11.518 − 37 =
  12. 12.147 − 29 =
  13. 13.360 − 49 =
  14. 14.168 − 99 =
  15. 15.102 − 57 =
  16. 16.191 − 17 =
  17. 17.485 − 67 =
  18. 18.241 − 38 =
  19. 19.362 − 59 =
  20. 20.393 − 39 =
  21. 21.498 − 27 =
  22. 22.186 − 47 =
  23. 23.208 − 27 =
  24. 24.298 − 88 =
  25. 25.541 − 37 =
  26. 26.232 − 39 =
  27. 27.504 − 86 =
  28. 28.462 − 19 =
  29. 29.581 − 99 =
  30. 30.393 − 88 =
  31. 31.211 − 56 =
  32. 32.376 − 57 =
  33. 33.390 − 49 =
  34. 34.169 − 97 =
  35. 35.107 − 18 =
  36. 36.198 − 69 =
  37. 37.174 − 98 =
  38. 38.323 − 78 =
  39. 39.169 − 76 =
  40. 40.364 − 47 =

Answer key

  1. 156
  2. 479
  3. 175
  4. 488
  5. 316
  6. 257
  7. 51
  8. 558
  9. 61
  10. 223
  11. 481
  12. 118
  13. 311
  14. 69
  15. 45
  16. 174
  17. 418
  18. 203
  19. 303
  20. 354
  21. 471
  22. 139
  23. 181
  24. 210
  25. 504
  26. 193
  27. 418
  28. 443
  29. 482
  30. 305
  31. 155
  32. 319
  33. 341
  34. 72
  35. 89
  36. 129
  37. 76
  38. 245
  39. 93
  40. 317

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