Б) (1/3+1/4)÷(2-5/6)

[latex]1) \frac{1}{3} + \frac{1}{4} = \frac{4+3}{12} = \frac{7}{12} \\ 2)2- \frac{5}{6} =1 \frac{1}{6} \\ 3) \frac{7}{12} :1 \frac{1}{6} = \frac{7}{12} * \frac{6}{7} = \frac{1}{2} [/latex] ответ [latex] \frac{1}{2} [/latex] ======================== [latex]1) \frac{1}{2} + \frac{1}{4} - \frac{2}{5} = \frac{10+5-8}{20} = \frac{7}{20} \\ 2) \frac{7}{20} : \frac{4}{5} = \frac{7}{20} * \frac{5}{4} = \frac{7}{16} [/latex] ответ [latex] \frac{7}{16} [/latex]

 (1/3+1/4)÷(2-5/6)(4/12+3/12):(12/6-5/6)=7/12:7/6=7/12*6/7=1/2*1/1=1/2=0,5