Question

Помогите плиз!!!!!! ​

Answer 1

Ответ:

$10 : \frac{2}{5} - \frac{3}{10} = 10 * \frac{5}{2} - \frac{3}{10} = \frac{10*5*5}{2*5} - \frac{3}{10} = \frac{250}{10} - \frac{3}{10} = \frac{250-3}{10} = \frac{247}{10}$

$(1\frac{1}{2} - \frac{3}{8} ) : 3 = (\frac{3}{2} - \frac{3}{8} ) : 3 = (\frac{3*4}{2*4} - \frac{3}{8} ) : 3 = (\frac{12}{8} - \frac{3}{8} ) : 3 =$

$(\frac{12-3}{8} ) : 3 = (\frac{9}{8} ) : 3 = \frac{9}{8*3} = \frac{3}{8}$