Question

помогите решить пример по действиям​

Answer 1

Пошаговое объяснение:

$\[\begin{gathered}20:33\frac{1}{3}-\left( {4\frac{7}{{25}}-1.28} \right):\left( {0.75+3\frac{1}{4}} \right)*0.2 =\boxed{\frac{9}{{20}}=0.45} \hfill \\1)4\frac{7}{{25}}-1.28=4\frac{7}{{25}}-1\frac{{28}}{{100}} = 4\frac{7}{{25}}-1\frac{7}{{25}} = 3 \hfill \\2)0.75+3\frac{1}{4}=0.75+3.25=4 \hfill \\3)20:33\frac{1}{3}=20:\frac{{100}}{3}=20*\frac{3}{{100}}=\frac{3}{5} \hfill \\ \end{gathered} \]$

$\[\begin{gathered}4)3:4=\frac{3}{4} \hfill \\5)\frac{3}{4}*0.2=\frac{3}{4}*\frac{2}{{10}} = \frac{3}{{20}} \hfill \\6)\frac{3}{5}-\frac{3}{{20}}=\frac{{3*4}}{{5*4}}-\frac{3}{{20}}=\frac{{12}}{{20}}-\frac{3}{{20}}=\frac{9}{{20}}=0.45 \hfill \\ \end{gathered} \]$