Question

№1
-1/4*8/6-7/18*9/2
№2
5/12*(1/5+3/25)

Answer 1

Ответ:

$-\frac{1}{4}*\frac{8}{6}-\frac{7}{18}*\frac{9}{2}=-\frac{2}{6} -\frac{7}{4} =-\frac{4}{12}-\frac{21}{12}=-\frac{25}{12}=-2\frac{1}{12}$$\frac{5}{12}*(\frac{1}{5}+\frac{3}{25} )= \frac{5}{12}*\frac{5+3}{25} =\frac{5}{12}*\frac{8}{25}=\frac{2}{15}$