А ) 1\2 * 4\5 * 5\6 , б ) 7\8 *4 \35 * 10\9 , в ) 13\12 * 24\65 *15\31 , г ) 5\16 * 8 \15...

А) $\frac{1}{2} * \frac{4}{5} * \frac{5}{6} = \frac{1*4*5}{2*5*6} = \frac{1*2*1}{1*1*6} = \frac{1}{3}$

б) $\frac{7*4*10}{8*35*9} = \frac{1*1*10}{2*5*9} = \frac{1}{9}$

в) $\frac{13*24*15}{12*65*31} = \frac{13*2*3}{1*13*31} = \frac{6}{31}$

г) $\frac{5*8*4}{16*15*3} = \frac{1*1*4}{2*3*3} = \frac{1*1*2}{1*3*3} = \frac{2}{9}$

д) $\frac{42*16*15}{56*5*36} = \frac{6*16*3}{8*1*36} = \frac{1*2*3}{1*1*6} = \frac{1}{1} =1$

е) $\frac{5*8*9}{8*9*10} = \frac{1*1*1}{1*1*2} = \frac{1}{2}$