Rút gọn phân số : `a) 2/4` `b) 4/6` `c) 9/81` 20/08/2021 Bởi Hadley Rút gọn phân số : `a) 2/4` `b) 4/6` `c) 9/81`
a) $\frac{2}{4}$ = $\frac{2:2}{4:2}$ = $\frac{1}{2}$ b) $\frac{4}{6}$ = $\frac{4:2}{6:2}$ = $\frac{2}{3}$ c) $\frac{9}{81}$ = $\frac{9:9}{81:9}$ = $\frac{1}{9}$ Bình luận
a/ $\dfrac24=\dfrac{2:2}{4:2}=\dfrac12$ b/ $\dfrac46=\dfrac{4:2}{6:2}=\dfrac23$ c/ $\dfrac9{81}=\dfrac{9:9}{81:9}=\dfrac19$ Bình luận
a) $\frac{2}{4}$ = $\frac{2:2}{4:2}$ = $\frac{1}{2}$
b) $\frac{4}{6}$ = $\frac{4:2}{6:2}$ = $\frac{2}{3}$
c) $\frac{9}{81}$ = $\frac{9:9}{81:9}$ = $\frac{1}{9}$
a/
$\dfrac24=\dfrac{2:2}{4:2}=\dfrac12$
b/
$\dfrac46=\dfrac{4:2}{6:2}=\dfrac23$
c/
$\dfrac9{81}=\dfrac{9:9}{81:9}=\dfrac19$