Question

12．直接寫得數(shù)．

$\frac{1}{3}$×0=	$\frac{1}{4}$×$\frac{2}{5}$=	$\frac{5}{11}$÷5=	$\frac{7}{12}$×$\frac{3}{14}$=
45×$\frac{3}{5}$=	9×$\frac{7}{18}$=	$\frac{2}{3}$×$\frac{9}{10}$=	$\frac{4}{25}$×100=
18×$\frac{1}{6}$=	$\frac{4}{11}$×$\frac{11}{4}$=	$\frac{2}{9}$×4=	$\frac{3}{25}$×$\frac{20}{51}$=
$\frac{3}{8}$×$\frac{2}{3}$=	14×$\frac{5}{21}$=	$\frac{13}{15}$×$\frac{3}{26}$=	$\frac{5}{8}$×$\frac{4}{5}$=
8÷$\frac{2}{3}$=	$\frac{4}{9}$×$\frac{3}{5}$=	$\frac{7}{12}$×$\frac{4}{7}$=	$\frac{15}{16}$÷5=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘法和分?jǐn)?shù)除法的計(jì)算方法進(jìn)行計(jì)算即可．

解答 解：

$\frac{1}{3}$×0=0	$\frac{1}{4}$×$\frac{2}{5}$=$\frac{1}{10}$	$\frac{5}{11}$÷5=$\frac{1}{11}$	$\frac{7}{12}$×$\frac{3}{14}$=$\frac{1}{8}$
45×$\frac{3}{5}$=27	9×$\frac{7}{18}$=$\frac{7}{2}$	$\frac{2}{3}$×$\frac{9}{10}$=$\frac{3}{5}$	$\frac{4}{25}$×100=16
18×$\frac{1}{6}$=3	$\frac{4}{11}$×$\frac{11}{4}$=1	$\frac{2}{9}$×4=$\frac{8}{9}$	$\frac{3}{25}$×$\frac{20}{51}$=$\frac{4}{85}$
$\frac{3}{8}$×$\frac{2}{3}$=$\frac{1}{4}$	14×$\frac{5}{21}$=$\frac{10}{3}$	$\frac{13}{15}$×$\frac{3}{26}$=$\frac{1}{10}$	$\frac{5}{8}$×$\frac{4}{5}$=$\frac{1}{2}$
8÷$\frac{2}{3}$=12	$\frac{4}{9}$×$\frac{3}{5}$=$\frac{4}{15}$	$\frac{7}{12}$×$\frac{4}{7}$=$\frac{1}{3}$	$\frac{15}{16}$÷5=$\frac{3}{16}$

點(diǎn)評(píng) 本題主要考查了學(xué)生對(duì)分?jǐn)?shù)乘除法的掌握情況，在計(jì)算時(shí)要細(xì)心．