Question

1．口算

$\frac{7}{48}$×4=	$\frac{3}{14}$×5=	3.14×0.3=	$\frac{5}{17}$×5=	3.6÷0.18=
$\frac{5}{8}$×0.4=	$\frac{2}{3}$+3=	16×$\frac{3}{8}$=	2-$\frac{3}{7}$=	0÷$\frac{5}{6}$=
$\frac{2}{3}$÷2=	$\frac{8}{15}$÷24=	$\frac{5}{2}$-$\frac{2}{5}$=	6÷$\frac{6}{13}$=	$\frac{9}{8}$×$\frac{2}{3}$=
$\frac{5}{7}$×$\frac{7}{10}$=	0.22×3.14=	15.7÷3.14=	$\frac{1}{8}$÷$\frac{1}{6}$=	$\frac{2}{5}$×10=
24×$\frac{7}{8}$=	$\frac{3}{4}$÷$\frac{3}{4}$=	3.78-1.32=	$\frac{1}{15}$÷$\frac{1}{2}$=	1÷$\frac{5}{3}$=
$\frac{3}{11}$÷3=	$\frac{4}{9}$×36=	$\frac{4}{5}$×$\frac{1}{4}$×$\frac{10}{3}$=	（1+$\frac{6}{8}$）×$\frac{8}{7}$=	9×$\frac{7}{4}$×$\frac{5}{3}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘以分?jǐn)?shù)，分?jǐn)?shù)乘以整數(shù)，整數(shù)除以分?jǐn)?shù)，分?jǐn)?shù)除以分?jǐn)?shù)，小數(shù)乘以小數(shù)，小數(shù)除以小數(shù)計(jì)算法則進(jìn)行口算；其中0.2²×3.14要先算出0.2的平方再乘以3.14，（1+$\frac{6}{8}$）×$\frac{8}{7}$先算出小括號里面的，再算小括號外面的分?jǐn)?shù)乘法，依此進(jìn)一步一一得出結(jié)果．

解答 解：

$\frac{7}{48}$×4=$\frac{7}{12}$	$\frac{3}{14}$×5=$1\frac{1}{14}$	3.14×0.3=0.942	$\frac{5}{17}$×5=$1\frac{8}{17}$	3.6÷0.18=20
$\frac{5}{8}$×0.4=$\frac{1}{4}$	$\frac{2}{3}$+3=$3\frac{2}{3}$	16×$\frac{3}{8}$=6	2-$\frac{3}{7}$=$1\frac{4}{7}$	0÷$\frac{5}{6}$=0
$\frac{2}{3}$÷2=$\frac{1}{3}$	$\frac{8}{15}$÷24=$\frac{1}{45}$	$\frac{5}{2}$-$\frac{2}{5}$=$2\frac{1}{10}$	6÷$\frac{6}{13}$=13	$\frac{9}{8}$×$\frac{2}{3}$=$\frac{3}{4}$
$\frac{5}{7}$×$\frac{7}{10}$=$\frac{1}{2}$	0.22×3.14=0.1256	15.7÷3.14=5	$\frac{1}{8}$÷$\frac{1}{6}$=$\frac{3}{4}$	$\frac{2}{5}$×10=4
24×$\frac{7}{8}$=21	$\frac{3}{4}$÷$\frac{3}{4}$=1	3.78-1.32=2.46	$\frac{1}{15}$÷$\frac{1}{2}$=$\frac{2}{15}$	1÷$\frac{5}{3}$=$\frac{3}{5}$
$\frac{3}{11}$÷3=$\frac{1}{11}$	$\frac{4}{9}$×36=16	$\frac{4}{5}$×$\frac{1}{4}$×$\frac{10}{3}$=$\frac{2}{3}$	（1+$\frac{6}{8}$）×$\frac{8}{7}$=2	9×$\frac{7}{4}$×$\frac{5}{3}$=$26\frac{1}{4}$

點(diǎn)評 此題主要考查了分?jǐn)?shù)乘法、分?jǐn)?shù)除法、小數(shù)除法、小數(shù)乘法計(jì)算法則的靈活應(yīng)用情況．