Question

Помогите пожалуйста! ​

Answer 1

$\frac{5}{7} + 3 \frac{1}{4} = \frac{5}{7} + \frac{3 \times 4 + 1}{4} = \frac{5}{7} + \frac{13}{4} = \frac{5 \times 4}{7 \times 4} + \frac{13 \times 7}{ 4\times 7} = \frac{20}{28} + \frac{91}{28} = \frac{20 + 91}{28} = \frac{111}{28} = 3 \frac{27}{28}$