Question

12．直接寫(xiě)得數(shù)．

$\frac{6}{7}$÷3=	$\frac{3}{5}$×1.5=	2-$\frac{3}{7}$=	$\frac{1}{4}$+0.4=	$\frac{7}{8}$÷0.7=
$\frac{4}{3}$×75%=	$\frac{7}{8}$×4×$\frac{8}{7}$=	$\frac{1}{6}$+$\frac{5}{6}$×$\frac{1}{5}$=	$\frac{1}{2}$×$\frac{1}{3}$÷$\frac{1}{2}$×$\frac{1}{3}$=	0.5×99+99×$\frac{1}{2}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)加減乘除法的計(jì)算方法進(jìn)行計(jì)算即可，$\frac{7}{8}$×4×$\frac{8}{7}$、$\frac{1}{2}$×$\frac{1}{3}$÷$\frac{1}{2}$×$\frac{1}{3}$根據(jù)乘法交換律進(jìn)行計(jì)算，0.5×99+99×$\frac{1}{2}$根據(jù)乘法分配律進(jìn)行計(jì)算即可．

解答 解：

$\frac{6}{7}$÷3=$\frac{2}{7}$	$\frac{3}{5}$×1.5=0.9	2-$\frac{3}{7}$=$\frac{11}{7}$	$\frac{1}{4}$+0.4=0.65	$\frac{7}{8}$÷0.7=$\frac{5}{4}$
$\frac{4}{3}$×75%=1	$\frac{7}{8}$×4×$\frac{8}{7}$=4	$\frac{1}{6}$+$\frac{5}{6}$×$\frac{1}{5}$=$\frac{1}{3}$	$\frac{1}{2}$×$\frac{1}{3}$÷$\frac{1}{2}$×$\frac{1}{3}$=$\frac{1}{9}$	0.5×99+99×$\frac{1}{2}$=99

點(diǎn)評(píng) 考查了分?jǐn)?shù)加減乘除法的口算能力，按照各自的計(jì)算方法進(jìn)行計(jì)算即可，靈活運(yùn)用運(yùn)算定律進(jìn)行計(jì)算．