Question

2．直接寫得數(shù)．

$\frac{7}{30}$×2=	$\frac{5}{7}$÷$\frac{5}{6}$=	$\frac{1}{6}$×$\frac{3}{10}$=	$\frac{8}{21}$×$\frac{7}{16}$=	4×$\frac{1}{4}$÷$\frac{3}{2}$=
$\frac{3}{8}$÷6=	$\frac{2}{9}$×$\frac{3}{5}$=	$\frac{1}{6}$÷$\frac{2}{3}$=	$\frac{7}{12}$×$\frac{6}{7}$=	$\frac{1}{5}$+$\frac{5}{6}$×$\frac{1}{5}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘法和除法的計(jì)算方法進(jìn)行解答，注意除以一個(gè)數(shù)等于乘這個(gè)數(shù)的倒數(shù)．

解答

解： $\frac{7}{30}$×2=$\frac{7}{15}$	$\frac{5}{7}$÷$\frac{5}{6}$=$\frac{6}{7}$	$\frac{1}{6}$×$\frac{3}{10}$=$\frac{1}{20}$	$\frac{8}{21}$×$\frac{7}{16}$=$\frac{1}{6}$	4×$\frac{1}{4}$÷$\frac{3}{2}$=$\frac{2}{3}$
$\frac{3}{8}$÷6=$\frac{1}{16}$	$\frac{2}{9}$×$\frac{3}{5}$=$\frac{2}{15}$	$\frac{1}{6}$÷$\frac{2}{3}$=$\frac{1}{4}$	$\frac{7}{12}$×$\frac{6}{7}$=$\frac{1}{2}$	$\frac{1}{5}$+$\frac{5}{6}$×$\frac{1}{5}$=$\frac{11}{30}$

點(diǎn)評 注意計(jì)算結(jié)果一定要化成最簡分?jǐn)?shù)，能約分的要先約分再計(jì)算．