Question

14．直接寫出得數(shù)

$\frac{6}{7}$÷3=	$\frac{3}{5}$×15=	2-$\frac{3}{7}$=	$\frac{4}{3}$×75%=
1+2%=	$\frac{7}{8}$÷$\frac{7}{10}$=	5÷$\frac{2}{3}$=	$\frac{7}{8}$×4×$\frac{8}{7}$=
$\frac{1}{6}$+$\frac{5}{6}$×$\frac{1}{5}$=	$\frac{1}{2}$×99+99×$\frac{1}{2}$=	$\frac{1}{5}$×4÷$\frac{1}{5}$×4=

Answer 1

分析 根據(jù)分?jǐn)?shù)加減乘除法運(yùn)算的計(jì)算法則計(jì)算即可求解．注意$\frac{1}{2}$×99+99×$\frac{1}{2}$變形為2×$\frac{1}{2}$×99計(jì)算，$\frac{1}{5}$×4÷$\frac{1}{5}$×4變形為（$\frac{1}{5}$÷$\frac{1}{5}$）×（4×4）計(jì)算．

解答 解：

$\frac{6}{7}$÷3=$\frac{2}{7}$	$\frac{3}{5}$×15=9	2-$\frac{3}{7}$=1$\frac{4}{7}$	$\frac{4}{3}$×75%=1
1+2%=1.02	$\frac{7}{8}$÷$\frac{7}{10}$=$\frac{5}{4}$	5÷$\frac{2}{3}$=7$\frac{1}{2}$	$\frac{7}{8}$×4×$\frac{8}{7}$=4
$\frac{1}{6}$+$\frac{5}{6}$×$\frac{1}{5}$=$\frac{1}{3}$	$\frac{1}{2}$×99+99×$\frac{1}{2}$=99	$\frac{1}{5}$×4÷$\frac{1}{5}$×4=16

點(diǎn)評(píng) 考查了分?jǐn)?shù)加減乘除法運(yùn)算，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．