Question

Помогите пожалуйста !!!

Answer 1

1)
$( \frac{3}{7} + \frac{1}{5} ) \times \frac{5}{11} = ( \frac{15}{35} + \frac{7}{35} ) \times \frac{5}{11} = \frac{22}{35} \times \frac{5}{11} = \frac{2}{7}$
2)
$( \frac{3}{5} + \frac{1}{9} ) \times \frac{5}{8} =( \frac{27}{45} + \frac{5}{45} ) \times \frac{5}{8} = \frac{32}{45} \times \frac{5}{8} = \frac{4}{9}$

Answer 2

(3/7+1/5)*5/11=(15/35+7/35)*5/11=22/35*5/11=2/14=1/7

(3/5+1/9)*5/8=27/45+3/45)*5/8=30/45*5/8=5/12