Question

2．直接写得数．

$\frac{1}{3}$×0=	$\frac{1}{4}$×$\frac{2}{5}$=	$\frac{5}{6}$×12=	$\frac{7}{12}$×$\frac{3}{14}$=
4.5×$\frac{3}{5}$=	9×$\frac{7}{18}$=	$\frac{2}{3}$×$\frac{9}{10}$=	$\frac{4}{25}$×100=
18×$\frac{1}{6}$=	$\frac{4}{5}$×$\frac{1}{2}$=	0.75×$\frac{3}{5}$=	$\frac{4}{9}$×$\frac{1}{10}$=
$\frac{3}{5}$×$\frac{5}{8}$=	$\frac{1}{2}$×$\frac{4}{3}$=	$\frac{4}{11}$×$\frac{11}{4}$=	$\frac{1}{7}$×$\frac{7}{10}$=

Answer 1

分析 根据分数乘法、分数除法、分数加法和分数减法的计算法则，进行解答即可．

解答 解：

$\frac{1}{3}$×0=0	$\frac{1}{4}$×$\frac{2}{5}$=$\frac{1}{10}$	$\frac{5}{6}$×12=10	$\frac{7}{12}$×$\frac{3}{14}$=$\frac{1}{8}$
4.5×$\frac{3}{5}$=2.7	9×$\frac{7}{18}$=3.5	$\frac{2}{3}$×$\frac{9}{10}$=$\frac{3}{5}$	$\frac{4}{25}$×100=16
18×$\frac{1}{6}$=3	$\frac{4}{5}$×$\frac{1}{2}$=$\frac{1}{10}$	0.75×$\frac{3}{5}$=0.45	$\frac{4}{9}$×$\frac{1}{10}$=$\frac{2}{45}$
$\frac{3}{5}$×$\frac{5}{8}$=$\frac{3}{8}$	$\frac{1}{2}$×$\frac{4}{3}$=$\frac{2}{3}$	$\frac{4}{11}$×$\frac{11}{4}$=1	$\frac{1}{7}$×$\frac{7}{10}$=$\frac{1}{10}$

点评 明确分数乘法、分数除法、分数加法和分数减法计算法则，是解答此题的关键．