Question

1．口算．

8×$\frac{3}{8}$=	15÷$\frac{1}{6}$=	$\frac{1}{5}$+$\frac{1}{4}$=	$\frac{1}{5}$÷$\frac{1}{4}$=
24×$\frac{1}{6}$=	24÷$\frac{3}{5}$=	51×$\frac{3}{17}$=	$\frac{4}{5}$×4=
2.6×$\frac{5}{13}$=	$\frac{2}{5}$+$\frac{5}{6}$=	$\frac{7}{12}$÷$\frac{1}{12}$=	0×$\frac{5}{13}$÷$\frac{5}{6}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)和小數(shù)加減乘除法的計(jì)算方法進(jìn)行計(jì)算．

解答 解：

8×$\frac{3}{8}$=3	15÷$\frac{1}{6}$=90	$\frac{1}{5}$+$\frac{1}{4}$=$\frac{9}{20}$	$\frac{1}{5}$÷$\frac{1}{4}$=$\frac{4}{5}$
24×$\frac{1}{6}$=4	24÷$\frac{3}{5}$=40	51×$\frac{3}{17}$=9	$\frac{4}{5}$×4=$\frac{16}{5}$
2.6×$\frac{5}{13}$=1	$\frac{2}{5}$+$\frac{5}{6}$=$\frac{37}{30}$	$\frac{7}{12}$÷$\frac{1}{12}$=7	0×$\frac{5}{13}$÷$\frac{5}{6}$=0

點(diǎn)評(píng) 口算時(shí)，注意運(yùn)算符號(hào)和數(shù)據(jù)，然后再進(jìn)一步計(jì)算．