To tus~
#Muoi
@Chae
$1.$
$a)$ $x$ $×$ $\frac{1}{2}$ = $\frac{1}{3}$
$x$ $=$ $\frac{1}{3}$ $:$ $\frac{1}{2}$
$x$ $=$ $\frac{2}{3}.$
$b)$ $x$ $:$ $\frac{4}{5}$ $=$ $\frac{5}{1}$
$x$ $=$ $\frac{5}{1}$ $×$ $\frac{4}{5}$
$x$ $=$ $\frac{20}{5}.$
$c)$ $\frac{2}{9}$ $:$ $x$ $=$ $\frac{2}{3}$
$x$ $=$ $\frac{2}{9}$ $:$ $\frac{2}{3}$
$x$ $=$ $\frac{6}{18}= $ $\frac{1}{3}.$
~Hok tốt~
Chị không có em nhé! Nếu sai cho chị xin lỗi nhaaa!!
