Question

Помогите с решением ​

Answer 1

$\frac{31}{60} + ( \frac{7}{20} + \frac{11}{60} ) \\ \frac{31}{60} + ( \frac{21}{60} + \frac{11}{60} ) = \frac{63}{60 } = 1 \frac{3}{60 } \\ 1 \frac{3}{60} = 1 \frac{1}{20}$

$\frac{13}{35} + ( \frac{23}{35} - \frac{2}{7} ) \\ \frac{13}{35} + ( \frac{23}{35} - \frac{10}{35} ) = \frac{26}{35}$