Question

1．直接寫(xiě)得數(shù)

$\frac{1}{5}$×$\frac{5}{7}$=	$\frac{9}{14}$×$\frac{7}{36}$=	$\frac{4}{5}$×$\frac{3}{8}$=	$\frac{2}{3}$+$\frac{3}{4}$=	$\frac{1}{9}$×1$\frac{1}{8}$=
5×$\frac{5}{7}$=	7×$\frac{5}{7}$=	$\frac{4}{5}$+$\frac{8}{15}$=	$\frac{3}{5}$×$\frac{10}{21}$=	0.375×0.375=

Answer 1

分析 根據(jù)分?jǐn)?shù)四則運(yùn)算的計(jì)算法則進(jìn)行計(jì)算即可，0.375×0.375轉(zhuǎn)化為分?jǐn)?shù)相乘簡(jiǎn)便．

解答 解：

$\frac{1}{5}$×$\frac{5}{7}$=$\frac{1}{7}$	$\frac{9}{14}$×$\frac{7}{36}$=$\frac{1}{8}$	$\frac{4}{5}$×$\frac{3}{8}$=$\frac{3}{10}$	$\frac{2}{3}$+$\frac{3}{4}$=$\frac{17}{12}$	$\frac{1}{9}$×1$\frac{1}{8}$=$\frac{1}{8}$
5×$\frac{5}{7}$=$\frac{25}{7}$	7×$\frac{5}{7}$=5	$\frac{4}{5}$+$\frac{8}{15}$=$\frac{4}{3}$	$\frac{3}{5}$×$\frac{10}{21}$=$\frac{2}{7}$	0.375×0.375=$\frac{9}{64}$

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．