Question

вычислите:$( frac{5}{8}- frac{5}{6} ):(- frac{15}{16} )-( frac{5}{8} + frac{5}{6} ): frac{7}{8}$ спасибо заранее:)) 

Answer 1

вычислите:
5/8 - 5/6 = 15/24 - 20/24 = - 5/24
(5/8 - 5/6):(-15/16) = (-5/24)*(-16/15) =(5*16)/(24*15) = 2/9
5/8 + 5/6 = 15/24 + 20/24 = 35/24
(5/8 + 5/6):(7/8) = (35/24)*(8/7) =(35*8)/(24*7) = 5/3
= 2/9 - 5/3 = 2/9 - 15/9 =(2-15)/9 =-13/9 = -1 4/9