Question

11．直接寫出得數(shù)．

$\frac{4}{5}$+$\frac{3}{15}$=	$\frac{3}{4}$÷6=	$\frac{1}{5}$×$\frac{16}{25}$=	$\frac{5}{6}$×0÷$\frac{3}{5}$=
$\frac{12}{33}$÷$\frac{3}{11}$=	$\frac{5}{12}$×0.36=	$\frac{9}{10}$÷$\frac{3}{20}$=	$\frac{2}{5}$--$\frac{2}{5}$×$\frac{1}{2}$=
$\frac{3}{8}$×12=	$\frac{21}{25}$÷42=	1.32×$\frac{12}{33}$=	5×$\frac{1}{5}$÷5×$\frac{1}{5}$=
14÷$\frac{7}{8}$=	0.25÷$\frac{2}{3}$=	0.4÷11$\frac{1}{5}$	8÷$\frac{1}{8}$-$\frac{1}{8}$×8=

Answer 1

分析 根據(jù)整數(shù)、分?jǐn)?shù)、小數(shù)、百分?jǐn)?shù)的加減乘除法的計(jì)算方法和四則混合運(yùn)算的運(yùn)算順序進(jìn)行計(jì)算即可，$\frac{2}{5}$--$\frac{2}{5}$×$\frac{1}{2}$根據(jù)乘法分配律進(jìn)行計(jì)算，5×$\frac{1}{5}$÷5×$\frac{1}{5}$根據(jù)乘法交換律進(jìn)行計(jì)算．

解答 解：

$\frac{4}{5}$+$\frac{3}{15}$=1	$\frac{3}{4}$÷6=$\frac{1}{8}$	$\frac{1}{5}$×$\frac{16}{25}$=$\frac{16}{125}$	$\frac{5}{6}$×0÷$\frac{3}{5}$=0
$\frac{12}{33}$÷$\frac{3}{11}$=$\frac{4}{3}$	$\frac{5}{12}$×0.36=0.15	$\frac{9}{10}$÷$\frac{3}{20}$=6	$\frac{2}{5}$--$\frac{2}{5}$×$\frac{1}{2}$=$\frac{1}{5}$
$\frac{3}{8}$×12=$\frac{9}{2}$	$\frac{21}{25}$÷42=$\frac{1}{50}$	1.32×$\frac{12}{33}$=0.48	5×$\frac{1}{5}$÷5×$\frac{1}{5}$=$\frac{1}{25}$
14÷$\frac{7}{8}$=16	0.25÷$\frac{2}{3}$=$\frac{3}{8}$	0.4÷11$\frac{1}{5}$=$\frac{1}{28}$	8÷$\frac{1}{8}$-$\frac{1}{8}$×8=63

點(diǎn)評(píng) 考查了整數(shù)、分?jǐn)?shù)、小數(shù)、百分?jǐn)?shù)的加減乘除法的口算能力，注意運(yùn)算順序和運(yùn)算方法，靈活運(yùn)用運(yùn)算定律進(jìn)行簡(jiǎn)算．