Question

15．直接寫得數(shù)：

$\frac{1}{2}$×$\frac{2}{3}$=	$\frac{1}{2}$÷$\frac{1}{4}$=	$\frac{2}{15}$+$\frac{1}{5}$=	$\frac{4}{15}$×3=
4×$\frac{1}{4}$÷4×$\frac{1}{4}$=	$\frac{8}{25}$÷$\frac{4}{5}$=	5-$\frac{3}{5}$=	$\frac{5}{12}$×$\frac{9}{10}$=
$\frac{2}{5}$×$\frac{1}{6}$=	$\frac{7}{8}$-$\frac{7}{8}$×$\frac{4}{5}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)四則運(yùn)算的計(jì)算法則及混合運(yùn)算的運(yùn)算順序進(jìn)行計(jì)算即可．

解答 解：

$\frac{1}{2}$×$\frac{2}{3}$=$\frac{1}{3}$	$\frac{1}{2}$÷$\frac{1}{4}$=2	$\frac{2}{15}$+$\frac{1}{5}$=$\frac{1}{3}$	$\frac{4}{15}$×3=$\frac{4}{5}$
4×$\frac{1}{4}$÷4×$\frac{1}{4}$=$\frac{1}{16}$	$\frac{8}{25}$÷$\frac{4}{5}$=$\frac{2}{5}$	5-$\frac{3}{5}$=4$\frac{2}{5}$	$\frac{5}{12}$×$\frac{9}{10}$=$\frac{3}{8}$
$\frac{2}{5}$×$\frac{1}{6}$=$\frac{1}{15}$	$\frac{7}{8}$-$\frac{7}{8}$×$\frac{4}{5}$=$\frac{7}{40}$

點(diǎn)評(píng) 此題考查了分?jǐn)?shù)四則運(yùn)算的計(jì)算法則的運(yùn)用．