Выполните действия.

А) (15 5/6 - 9 25/27) -(2/3 5/18) + 7/27 + 13/8


Б) ( 20 8/15 • 7 1/2 - 54 3/5 + 2/5) : ( 3 13/21 • 8 2/5 - 29 2/5) - 5/6•1 1/5 + 21/25
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