Question

1．計(jì)算．

$\frac{2}{7}$×3	$\frac{13}{49}$×21	$\frac{5}{6}$×$\frac{5}{3}$	$\frac{5}{12}$÷5
$\frac{5}{6}$÷$\frac{5}{7}$	10÷$\frac{2}{15}$	$\frac{7}{12}$×$\frac{8}{21}$×$\frac{9}{10}$	6x=$\frac{3}{4}$

Answer 1

分析 根據(jù)分?jǐn)?shù)乘除法的計(jì)算方法和等式的基本性質(zhì)進(jìn)行計(jì)算即可．

解答 解：$\frac{2}{7}$×3=$\frac{6}{7}$

$\frac{13}{49}$×21=$\frac{39}{7}$

$\frac{5}{6}$×$\frac{5}{3}$=$\frac{25}{18}$

$\frac{5}{12}$÷5=$\frac{1}{12}$

$\frac{5}{6}$÷$\frac{5}{7}$=$\frac{7}{6}$

10÷$\frac{2}{15}$=75

$\frac{7}{12}$×$\frac{8}{21}$×$\frac{9}{10}$    
=$\frac{2}{9}$×$\frac{9}{10}$
=$\frac{1}{5}$；

    6x=$\frac{3}{4}$
6x÷6=$\frac{3}{4}$÷6
     x=$\frac{1}{8}$．

點(diǎn)評(píng) 考查了分?jǐn)?shù)四則混合運(yùn)算，注意運(yùn)算順序和運(yùn)算方法，解方程時(shí)注意等號(hào)對(duì)齊．