сложение и вычитание смешанных дробей.
294. 1) 5 5/6-1 1/3; 2). 7 5/7 - 4 5/14; 3). 11 7/8- 5 1/2; 4). 2 7/8- 3/16.

быстрее дам 20 баллов​
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