Question

Помогите вычислите!!!плз

Answer 1

$2 \frac{1}{7} -1 \frac{1}{5} =1 \frac{5-7}{35} =1- \frac{2}{35} = \frac{33}{35}$

3,5*$\frac{33}{35} = \frac{7}{2} * \frac{33}{35} = \frac{33}{10} =3,3$

Answer 2

$3.5*(2 \frac{1}{7} -1 \frac{1}{5} )=3.3 \\ 1) 2 \frac{1}{7} -1 \frac{1}{5} =2 \frac{5}{35} -1 \frac{7}{35} =1 \frac{40}{35} -1 \frac{7}{35} = \frac{33}{35} \\ \\ 2)3.5* \frac{33}{35} = \frac{35}{10} * \frac{33}{35} = \frac{33}{10} =3.3$

Otviet: A)