Question

Вот два примера. Помогите решить.

Answer 1

$(3.24:\frac{9}{7}-3\frac{1}{5}:1\frac{1}{3}):(-0.9)=(3.24*\frac{7}{9}-\frac{16}{5}*\frac{3}{4}):(-0.9)=$

$(0.36*7-\frac{12}{5}):(-0.9)=(2.52-2.4):(-0.9)=-0.12:0.9=$ 

$=-\frac{12}{100}*\frac{10}{9}=-\frac{4}{30}$ 

 

$3\frac{1}{7}*7.425+(-6.425)*3\frac{1}{7}=3\frac{1}{7}(7.425-6.425)=3\frac{1}{7}*1=3\frac{1}{7}$