Question

6．直接寫得數(shù)

$\frac{2}{5}$+$\frac{1}{2}$=	3 $\frac{1}{4}$+1.75=	$\frac{3}{5}$÷$\frac{1}{3}$=	$\frac{1}{8}$×$\frac{1}{8}$=	$\frac{2}{3}$×0+3=
$\frac{6}{7}$×$\frac{7}{15}$=	$\frac{5}{6}$-$\frac{1}{2}$=	$\frac{1}{4}$+$\frac{1}{5}$=	$\frac{5}{6}$×$\frac{3}{4}$=	$\frac{4}{5}$×$\frac{1}{4}$÷$\frac{4}{5}$×$\frac{1}{4}$=

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，$\frac{4}{5}$×$\frac{1}{4}$÷$\frac{4}{5}$×$\frac{1}{4}$運(yùn)用乘法交換律簡(jiǎn)算．

解答 解：

$\frac{2}{5}$+$\frac{1}{2}$=$\frac{9}{10}$	3 $\frac{1}{4}$+1.75=5	$\frac{3}{5}$÷$\frac{1}{3}$=$\frac{9}{5}$	$\frac{1}{8}$×$\frac{1}{8}$=$\frac{1}{64}$	$\frac{2}{3}$×0+3=3
$\frac{6}{7}$×$\frac{7}{15}$=$\frac{2}{5}$	$\frac{5}{6}$-$\frac{1}{2}$=$\frac{1}{3}$	$\frac{1}{4}$+$\frac{1}{5}$=$\frac{9}{20}$	$\frac{5}{6}$×$\frac{3}{4}$=$\frac{5}{8}$	$\frac{4}{5}$×$\frac{1}{4}$÷$\frac{4}{5}$×$\frac{1}{4}$=$\frac{1}{16}$

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．