Помогите решить примеры:Вычислите:  – 4 / 5 + 5 / 6 – 1 / 2 =

- ( 4/5 ) + ( 5/6 ) - ( 1/2 ) = - ( 24/30 ) - ( 15/30 ) + ( 25/30 ) = - ( 39/30 ) + ( 25/30 ) = - ( 14/30 ) = - ( 7/15 )

- [latex] \frac{24}{30} [/latex] + [latex] \frac{25}{30} [/latex] - [latex] \frac{15}{30} [/latex] = [latex] \frac{14}{30} [/latex] = [latex] \frac{7}{15} [/latex]