Question

16．直接寫出得數(shù)．

$\frac{1}{2}$×$\frac{4}{5}$=	$\frac{3}{7}$×$\frac{7}{3}$=	$\frac{2}{5}$×5=	$\frac{5}{7}$×$\frac{3}{14}$=
$\frac{5}{8}$×$\frac{24}{5}$=	$\frac{7}{16}$×32=	$\frac{5}{9}$×$\frac{6}{25}$×$\frac{5}{6}$=	32π=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘法的計(jì)算法則，依次進(jìn)行計(jì)算即可．

解答 解：

$\frac{1}{2}$×$\frac{4}{5}$=$\frac{2}{5}$	$\frac{3}{7}$×$\frac{7}{3}$=1	$\frac{2}{5}$×5=2	$\frac{5}{7}$×$\frac{3}{14}$=$\frac{15}{98}$
$\frac{5}{8}$×$\frac{24}{5}$=3	$\frac{7}{16}$×32=14	$\frac{5}{9}$×$\frac{6}{25}$×$\frac{5}{6}$=$\frac{1}{9}$	32π=9π

點(diǎn)評(píng) 此題考查了分?jǐn)?shù)乘法，明確分?jǐn)?shù)乘法的計(jì)算法則，是解答此題的關(guān)鍵．