1) 6* 2\11*5*1\8+1*9\11* 5*1\8=? 2) 6,71*2,8-4,71*2,8=?

1) [latex]6* \frac{2}{11} *5* \frac{1}{8} +1* \frac{9}{11} * 5* \frac{1}{8} = \frac{12}{11} * \frac{5}{8} + \frac{9}{11} * \frac{5}{8} = \frac{5}{8} ( \frac{12}{11} + \frac{9}{11} )= \frac{5}{8} *\frac{21}{11}= [/latex][latex]= \frac{105}{88} =1 \frac{17}{88} [/latex] или условие должно было быть таким:  [latex]6 \frac{2}{11} *5 \frac{1}{8} +1 \frac{9}{11} *5 \frac{1}{8}= 5 \frac{1}{8}(6 \frac{2}{11} +1 \frac{9}{11})=5 \frac{1}{8} *8= \frac{41}{8} *8=41[/latex] 2) [latex]6,71*2,8-4,71*2,8=2,8(6,71-4,71)=2,8*2=5,6[/latex]