Question

14．直接寫得數(shù)．

$\frac{2}{13}$×5=	$\frac{3}{19}$×6=	$\frac{4}{11}$×5=	$\frac{2}{7}$×3=
$\frac{1}{6}$×10=	$\frac{5}{12}$×8=	$\frac{5}{6}$×12=	$\frac{3}{5}$×6=

Answer 1

分析 此題屬于一個數(shù)乘分?jǐn)?shù)的計(jì)算，用整數(shù)與分子相乘的積做分子，分母不變，能約分的要約分．據(jù)此計(jì)算．

解答 解：

$\frac{2}{13}$×5=$\frac{10}{13}$	$\frac{3}{19}$×6=$\frac{18}{19}$	$\frac{4}{11}$×5=$\frac{20}{11}$	$\frac{2}{7}$×3=$\frac{6}{7}$
$\frac{1}{6}$×10=$\frac{5}{3}$	$\frac{5}{12}$×8=$\frac{10}{3}$	$\frac{5}{6}$×12=10	$\frac{3}{5}$×6=$\frac{18}{5}$

點(diǎn)評 此題考查了一個數(shù)乘分?jǐn)?shù)的意義，根據(jù)計(jì)算法則計(jì)算即可．