Question

6．口算下面各題．

$\frac{2}{9}$×$\frac{3}{5}$=	$\frac{6}{7}$×$\frac{7}{9}$=	$\frac{5}{8}$×$\frac{4}{15}$=	$\frac{9}{20}$×$\frac{5}{21}$=	$\frac{2}{15}$×4=
$\frac{2}{15}$×8=	$\frac{19}{12}$×$\frac{12}{19}$=	$\frac{7}{22}$×$\frac{22}{7}$=	1.2×$\frac{3}{5}$=	2.4×$\frac{5}{6}$=
$\frac{9}{10}$÷3=	$\frac{3}{8}$÷2=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘除法運算的計算法則計算即可求解．

解答 解：

$\frac{2}{9}$×$\frac{3}{5}$=$\frac{2}{15}$	$\frac{6}{7}$×$\frac{7}{9}$=$\frac{2}{3}$	$\frac{5}{8}$×$\frac{4}{15}$=$\frac{1}{6}$	$\frac{9}{20}$×$\frac{5}{21}$=$\frac{3}{28}$	$\frac{2}{15}$×4=$\frac{8}{15}$
$\frac{2}{15}$×8=$\frac{16}{15}$	$\frac{19}{12}$×$\frac{12}{19}$=1	$\frac{7}{22}$×$\frac{22}{7}$=1	1.2×$\frac{3}{5}$=$\frac{18}{25}$	2.4×$\frac{5}{6}$=2
$\frac{9}{10}$÷3=$\frac{3}{10}$	$\frac{3}{8}$÷2=$\frac{3}{16}$

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