Question

2．下面各题写出必要的计算过程．

$\frac{4}{15}$×75	$\frac{7}{18}$×$\frac{9}{14}$	$\frac{7}{18}$×$\frac{9}{14}$
$\frac{11}{14}$×$\frac{7}{10}$×$\frac{8}{33}$	$\frac{3}{5}$×$\frac{5}{27}$×$\frac{3}{8}$	$\frac{4}{5}$×$\frac{5}{8}$×$\frac{5}{12}$．

Answer 1

分析 根据分数乘法运算的计算法则计算即可求解．

解答 解：$\frac{4}{15}$×75=20

$\frac{7}{18}$×$\frac{9}{14}$=$\frac{1}{4}$

$\frac{7}{18}$×$\frac{9}{14}$=$\frac{1}{4}$

$\frac{11}{14}$×$\frac{7}{10}$×$\frac{8}{33}$
=$\frac{11}{20}$×$\frac{8}{33}$
=$\frac{2}{15}$

$\frac{3}{5}$×$\frac{5}{27}$×$\frac{3}{8}$
=$\frac{1}{9}$×$\frac{3}{8}$
=$\frac{1}{24}$

$\frac{4}{5}$×$\frac{5}{8}$×$\frac{5}{12}$
=$\frac{1}{2}$×$\frac{5}{12}$
=$\frac{5}{24}$

点评 考查了分数乘法运算，关键是熟练掌握计算法则正确进行计算．