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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 694 · 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. 1.162 − 79 =
  2. 2.471 − 89 =
  3. 3.551 − 96 =
  4. 4.363 − 59 =
  5. 5.57 − 26 =
  6. 6.364 − 58 =
  7. 7.570 − 96 =
  8. 8.428 − 99 =
  9. 9.165 − 67 =
  10. 10.254 − 48 =
  11. 11.198 − 58 =
  12. 12.133 − 78 =
  13. 13.215 − 37 =
  14. 14.429 − 38 =
  15. 15.153 − 97 =
  16. 16.161 − 19 =
  17. 17.542 − 97 =
  18. 18.80 − 38 =
  19. 19.223 − 46 =
  20. 20.96 − 58 =
  21. 21.291 − 99 =
  22. 22.76 − 16 =
  23. 23.458 − 18 =
  24. 24.366 − 38 =
  25. 25.491 − 37 =
  26. 26.128 − 49 =
  27. 27.177 − 58 =
  28. 28.325 − 18 =
  29. 29.517 − 19 =
  30. 30.164 − 76 =
  31. 31.306 − 88 =
  32. 32.579 − 16 =
  33. 33.196 − 39 =
  34. 34.283 − 18 =
  35. 35.396 − 17 =
  36. 36.314 − 49 =
  37. 37.151 − 37 =
  38. 38.542 − 49 =
  39. 39.342 − 96 =
  40. 40.467 − 38 =

Answer key

  1. 83
  2. 382
  3. 455
  4. 304
  5. 31
  6. 306
  7. 474
  8. 329
  9. 98
  10. 206
  11. 140
  12. 55
  13. 178
  14. 391
  15. 56
  16. 142
  17. 445
  18. 42
  19. 177
  20. 38
  21. 192
  22. 60
  23. 440
  24. 328
  25. 454
  26. 79
  27. 119
  28. 307
  29. 498
  30. 88
  31. 218
  32. 563
  33. 157
  34. 265
  35. 379
  36. 265
  37. 114
  38. 493
  39. 246
  40. 429

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