Question

14．直接寫得數(shù)．

7×$\frac{4}{21}$=	$\frac{1}{3}$×0.15=	$\frac{3}{7}$÷$\frac{8}{7}$=	$\frac{5}{8}$×$\frac{1}{5}$=
26×$\frac{12}{13}$=	$\frac{8}{27}$÷$\frac{2}{9}$=	10-$\frac{2}{5}$=	5×$\frac{3}{10}$=
$\frac{9}{5}$÷$\frac{3}{10}$=	$\frac{8}{21}$×$\frac{7}{16}$=	$\frac{14}{13}$÷28=	$\frac{9}{14}$×$\frac{14}{15}$×$\frac{5}{9}$=
$\frac{7}{12}$+$\frac{5}{6}$=	17-7$\frac{2}{5}$=	0÷$\frac{8}{9}$×$\frac{7}{18}$=	$\frac{1}{2}$×$\frac{1}{3}$÷$\frac{1}{3}$×$\frac{1}{2}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)加減乘除法的計(jì)算方法進(jìn)行解答即可．

解答 解：

7×$\frac{4}{21}$=12	$\frac{1}{3}$×0.15=$\frac{1}{20}$	$\frac{3}{7}$÷$\frac{8}{7}$=$\frac{3}{8}$	$\frac{5}{8}$×$\frac{1}{5}$=$\frac{1}{8}$
26×$\frac{12}{13}$=24	$\frac{8}{27}$÷$\frac{2}{9}$=$\frac{4}{3}$	10-$\frac{2}{5}$=9$\frac{3}{5}$	5×$\frac{3}{10}$=$\frac{3}{2}$
$\frac{9}{5}$÷$\frac{3}{10}$=$\frac{21}{10}$	$\frac{8}{21}$×$\frac{7}{16}$=$\frac{1}{6}$	$\frac{14}{13}$÷28=$\frac{1}{26}$	$\frac{9}{14}$×$\frac{14}{15}$×$\frac{5}{9}$=$\frac{1}{3}$
$\frac{7}{12}$+$\frac{5}{6}$=$\frac{17}{12}$	17-7$\frac{2}{5}$=9$\frac{3}{5}$	0÷$\frac{8}{9}$×$\frac{7}{18}$=0	$\frac{1}{2}$×$\frac{1}{3}$÷$\frac{1}{3}$×$\frac{1}{2}$=$\frac{1}{4}$

點(diǎn)評(píng) 此題考查了分?jǐn)?shù)加減乘除法的口算能力．