Question

Вычислите: 3 1/4:(7/8-2/3)-2*1 1/4
даю 30 балов)​

Answer 1

Ответ:$3\frac{1}{4}:(\frac{7}{8}-\frac{2}{3})-2*1\frac{1}{4}=\frac{13}{4}:(\frac{21}{24} -\frac{16}{24}) -2*\frac{5}{4} =\frac{13}{4} :\frac{24}{5}- \frac{5}{2} =\frac{78}{5} -\frac{5}{2} =\frac{156-25}{10} =\frac{131}{10} =13,1$