Question

19．直接寫得數(shù)．

$\frac{4}{9}$×0=	$\frac{1}{6}$×$\frac{2}{5}$=	$\frac{3}{7}$×14=	$\frac{7}{12}$×$\frac{3}{14}$=	3.6×$\frac{2}{9}$=
8×$\frac{5}{24}$=	$\frac{2}{3}$×$\frac{9}{10}$=	$\frac{7}{15}$×7.5=	$\frac{2}{11}$×$\frac{11}{2}$=	22×$\frac{2}{11}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘法運算的計算法則計算即可求解．

解答 解：

$\frac{4}{9}$×0=0	$\frac{1}{6}$×$\frac{2}{5}$=$\frac{1}{15}$	$\frac{3}{7}$×14=6	$\frac{7}{12}$×$\frac{3}{14}$=$\frac{1}{8}$	3.6×$\frac{2}{9}$=0.8
8×$\frac{5}{24}$=$\frac{5}{3}$	$\frac{2}{3}$×$\frac{9}{10}$=$\frac{3}{5}$	$\frac{7}{15}$×7.5=3.5	$\frac{2}{11}$×$\frac{11}{2}$=1	22×$\frac{2}{11}$=4

點評 考查了分?jǐn)?shù)乘法運算，關(guān)鍵是熟練掌握計算法則正確進行計算．