Question

По действиям пж.
1 13/14 - (2 - 1 11/35) : 9/25 + 4/21
( / - дробная черта)

Answer 1

Решение:

$\[\begin{gathered}1\frac{{13}}{{14}}-(2-1\frac{{11}}{{35}}):\frac{9}{{25}}+\frac{4}{{21}}=\frac{3}{{14}}\hfill\\1)\;\;2-1\frac{{11}}{{35}}=1\frac{{35}}{{35}}-1\frac{{11}}{{35}}=\frac{{24}}{{35}}\hfill\\2)\;\;\frac{{24}}{{35}}:\frac{9}{{25}}=\frac{{24}}{{35}}*\frac{{25}}{9}=\frac{{40}}{{21}}=1\frac{{19}}{{21}}\hfill\\\end{gathered}\]$

$\[\begin{gathered}3)\;\;1\frac{{13}}{{14}}-1\frac{{19}}{{21}}=1\frac{{39}}{{42}}-1\frac{{38}}{{42}}=\frac{1}{{42}}\hfill\\4)\;\;\frac{1}{{42}}+\frac{4}{{21}}=\frac{1}{{42}}+\frac{8}{{42}}=\frac{9}{{42}}=\frac{3}{{14}}\hfill\\\end{gathered}\]$