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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 290 · 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. 1.351 − 59 =
  2. 2.361 − 39 =
  3. 3.285 − 86 =
  4. 4.406 − 76 =
  5. 5.385 − 37 =
  6. 6.165 − 98 =
  7. 7.378 − 79 =
  8. 8.346 − 48 =
  9. 9.546 − 57 =
  10. 10.494 − 29 =
  11. 11.318 − 88 =
  12. 12.251 − 28 =
  13. 13.98 − 58 =
  14. 14.63 − 56 =
  15. 15.201 − 97 =
  16. 16.153 − 39 =
  17. 17.181 − 39 =
  18. 18.271 − 56 =
  19. 19.308 − 16 =
  20. 20.248 − 68 =
  21. 21.130 − 26 =
  22. 22.55 − 17 =
  23. 23.460 − 96 =
  24. 24.321 − 96 =
  25. 25.585 − 59 =
  26. 26.479 − 38 =
  27. 27.353 − 88 =
  28. 28.190 − 56 =
  29. 29.549 − 38 =
  30. 30.95 − 66 =
  31. 31.148 − 86 =
  32. 32.583 − 19 =
  33. 33.422 − 69 =
  34. 34.238 − 16 =
  35. 35.340 − 76 =
  36. 36.482 − 99 =
  37. 37.71 − 16 =
  38. 38.137 − 18 =
  39. 39.529 − 46 =
  40. 40.237 − 36 =

Answer key

  1. 292
  2. 322
  3. 199
  4. 330
  5. 348
  6. 67
  7. 299
  8. 298
  9. 489
  10. 465
  11. 230
  12. 223
  13. 40
  14. 7
  15. 104
  16. 114
  17. 142
  18. 215
  19. 292
  20. 180
  21. 104
  22. 38
  23. 364
  24. 225
  25. 526
  26. 441
  27. 265
  28. 134
  29. 511
  30. 29
  31. 62
  32. 564
  33. 353
  34. 222
  35. 264
  36. 383
  37. 55
  38. 119
  39. 483
  40. 201

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