Question

Помогите пожалуйста !!!

Answer 1

1) 14 5 2
__ * __ = _
15 7 3


2) 16 3 4
_ * _ = _
21 4 7

Answer 2

1.
$\frac{3}{5} + \frac{1}{3} = \frac{9}{15} + \frac{5}{15} = \frac{14}{15}$
$\frac{14}{15} \times \frac{5}{7} = \frac{2}{3}$
2.
$\frac{3}{7} + \frac{1}{3} = \frac{9}{21} + \frac{7}{21} = \frac{16}{21}$
$\frac{16}{21} \times \frac{3}{4} = \frac{4}{7}$