Question

помогите 2 пример срочно) заранее спасибо

Answer 1

$\displaystyle \tt \frac{\bigg(28:1\frac{3}{4}+1\frac{1}{3}:22+1\frac{2}{3}\cdot9\frac{3}{11}+4:1\frac{1}{2}\bigg)\cdot3\frac{1}{7}}{67\frac{1}{7}-47\cdot\frac{2}{7}}=2\\\\\\1). \ \ 28:1\frac{3}{4}=28\cdot\frac{4}{7}=16\\\\2). \ \ 1\frac{1}{3}:22=\frac{4}{3}\cdot\frac{1}{22}=\frac{2}{33}\\\\3). \ \ 1\frac{2}{3}\cdot9\frac{3}{11}=\frac{5}{3}\cdot\frac{102}{11}=\frac{170}{11}\\\\4). \ \ 4:1\frac{1}{2}=4\cdot\frac{2}{3}=\frac{8}{3}$

$\displaystyle \tt5). \ \ 16+\frac{2}{33}+\frac{170}{11}+\frac{8}{3}=16+\frac{2+510+88}{33}=34\frac{2}{11}\\\\6). \ \ 34\frac{2}{11}\cdot3\frac{1}{7}=\frac{376}{11}\cdot\frac{22}{7}=\frac{752}{7}\\\\7). \ \ 47\cdot\frac{2}{7}=\frac{94}{7}\\\\8). \ \ 67\frac{1}{7}-\frac{94}{7}=\frac{470-94}{7}=\frac{376}{7}\\\\9). \ \ \frac{752}{7}:\frac{376}{7}=\frac{752}{7}\cdot\frac{7}{376}=2;$