8,4\2 1/3-10 5/6*8/13+1 1/15

$8.4:2 \frac{1}{3} -10 \frac{5}{6} * \frac{8}{13} +1 \frac{1}{15} = ? \\ \\ 1) 8.4 : 2 \frac{1}{3} = \frac{84}{10} : \frac{7}{3} = \frac{84}{10} * \frac{3}{7} = \frac{18}{5} \\ \\ 2) 10 \frac{5}{6} * \frac{8}{13} = \frac{65}{6} * \frac{8}{13} = \frac{20}{3} \\ \\ 3) \frac{18}{5} - \frac{20}{3} = \frac{54}{15} - \frac{100}{15} = -\frac{46}{15} \\ \\ 4) - \frac{46}{15} +1 \frac{1}{15} =- \frac{46}{15} + \frac{16}{15} =- \frac{30}{15} =-2$

Ответ: -2