Bài 2: Trang 17 VBT toán 5 tập 1
Tìm $x$:
a) $x$ x $\frac{2}{5}$ = $\frac{4}{7}$ b) $x$ : $\frac{6}{11}$ = $\frac{44}{9}$
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Bài Làm:
a) $x$ x $\frac{2}{5}$ = $\frac{4}{7}$
$x$ = $\frac{4}{7}$ : $\frac{2}{5}$
$x$ = $\frac{4}{7}$ x $\frac{5}{2}$
$x$ = $\frac{10}{7}$
b) $x$ : $\frac{6}{11}$ = $\frac{44}{9}$
$x$ = $\frac{44}{9}$ x $\frac{6}{11}$
$x$ = $\frac{264}{99}$