Question

Очень срочно даю 18 балов

Answer 1

Ответ:

39/7×28/13-7/5 /1/2+2/15=3×3-7/5×2+2/15=9-14/5+2/15=135-42+2\5=19

Answer 2

$5\frac{4}{7} *2\frac{2}{13} -1\frac{2}{5} /\frac{1}{2} +\frac{2}{15} =\frac{39}{7} *2*\frac{2}{13} -\frac{7}{5} *5+\frac{2}{15} =\frac{3}{7} *2*2-7+\frac{2}{15} =\frac{12}{7} -7+\frac{2}{15} \\\\=-\frac{541}{105}=-5\frac{16}{105}$