Question

5．直接寫(xiě)出得數(shù)．

$\frac{1}{2}$×$\frac{1}{2}$=	$\frac{3}{11}$×$\frac{2}{3}$=	$\frac{4}{5}$×$\frac{5}{8}$=	4×$\frac{1}{5}$=
$\frac{4}{9}$×$\frac{3}{4}$=	$\frac{6}{7}$×$\frac{5}{12}$=	$\frac{1}{2}$×$\frac{2}{7}$=	28×$\frac{4}{35}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘法的計(jì)算方法進(jìn)行計(jì)算，最后要化成最簡(jiǎn)分?jǐn)?shù)．

解答 解：

$\frac{1}{2}$×$\frac{1}{2}$=$\frac{1}{4}$	$\frac{3}{11}$×$\frac{2}{3}$=$\frac{2}{11}$	$\frac{4}{5}$×$\frac{5}{8}$=$\frac{1}{2}$	4×$\frac{1}{5}$=$\frac{4}{5}$
$\frac{4}{9}$×$\frac{3}{4}$=$\frac{1}{3}$	$\frac{6}{7}$×$\frac{5}{12}$=$\frac{5}{14}$	$\frac{1}{2}$×$\frac{2}{7}$=$\frac{1}{7}$	28×$\frac{4}{35}$=$\frac{16}{5}$

點(diǎn)評(píng) 本題考查了學(xué)生對(duì)分?jǐn)?shù)乘法計(jì)算方法的掌握，在計(jì)算時(shí)要細(xì)心．