Question

17．直接寫出得數(shù)．

$\frac{1}{4}$×0=	$\frac{1}{6}$×$\frac{2}{5}$=	20+$\frac{4}{5}$=	$\frac{15}{16}$÷$\frac{15}{16}$=
$\frac{2}{5}$÷$\frac{5}{8}$=	1÷3×$\frac{1}{3}$=	$\frac{25}{26}$÷5=	$\frac{5}{6}$×$\frac{9}{10}$=

Answer 1

分析 運(yùn)用分?jǐn)?shù)的乘除及減法的計(jì)算法則進(jìn)行計(jì)算即可．

解答

解：$\frac{1}{4}$×0=0	$\frac{1}{6}$×$\frac{2}{5}$=$\frac{1}{15}$	20+$\frac{4}{5}$=20.8	$\frac{15}{16}$÷$\frac{15}{16}$=1
$\frac{2}{5}$÷$\frac{5}{8}$=$\frac{16}{25}$	1÷3×$\frac{1}{3}$=$\frac{1}{9}$	$\frac{25}{26}$÷5=$\frac{5}{26}$	$\frac{5}{6}$×$\frac{9}{10}$=$\frac{3}{4}$

點(diǎn)評(píng) 本題考查了分?jǐn)?shù)的乘除法的計(jì)算法則及分?jǐn)?shù)加法的計(jì)算法則，注意計(jì)算的結(jié)果要化成最簡(jiǎn)分?jǐn)?shù)．