[tex] - \frac{5}{16} \times \frac{4}{7} - \frac{21}{32} \div ( - \frac{9}{4} ) = \\ \\ \\ \\ \frac{3}{5} \times \frac{7}{8} - \frac{3}{5} \times ( \frac{7}{8} - \frac{5}{6} ) = [/tex]
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Ответ:
Пошаговое объяснение:
1) - 5/16*4/7=-5/28
21/32:(-9/4)=21/32*(-4/9)=-7/24
-5/28-(-7/24)=-30/168+49/168=
19/168
2) 7/8-5/6=21/24-20/24=1/24
3/5*7/8-3/5*1/24=3/5*(7/8-1/24)=3/5*
(21/24-1/24)=3/5*20/24=1/2