вычислите:[tex]( \frac{5}{8}- \frac{5}{6} ):(- \frac{15}{16} )-( \frac{5}{8} + \frac{5}{6} ): \frac{7}{8} [/tex] спасибо заранее:))
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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