б) 2 3/4 : (1 1/2 - 2/5) +  ( 3/4 + 5/6 ) : 3 1/6; Ответы: б) = 3 , г) = 10.
г) (3 1/2 : 4 2/3 + 4 2/3 : 3 1/2 ) ·4 4/5;
 / - дробная черта ( типо  3/4 =   3)  Помогите плиз
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