Question

3．直接寫出下題的得數(shù)

6.2+8=	$\frac{2}{5}$+$\frac{1}{4}$=	6×$\frac{2}{5}$=	10.5-6.9=	（$\frac{1}{5}$-$\frac{1}{6}$）×30=
$\frac{4}{5}$-$\frac{1}{2}$=	1÷$\frac{4}{7}$=	$\frac{5}{6}$×12=	1÷0.125=	$\frac{2}{3}$×$\frac{2}{3}$÷$\frac{2}{3}$×$\frac{2}{3}$=

Answer 1

分析 根據(jù)小數(shù)和分?jǐn)?shù)四則運算的運算法則計算即可，（$\frac{1}{5}$-$\frac{1}{6}$）×30運用乘法分配律簡算即可．

解答 解：

6.2+8=14.2	$\frac{2}{5}$+$\frac{1}{4}$=$\frac{13}{20}$	6×$\frac{2}{5}$=$\frac{12}{5}$	10.5-6.9=3.6	（$\frac{1}{5}$-$\frac{1}{6}$）×30=1
$\frac{4}{5}$-$\frac{1}{2}$=0.3	1÷$\frac{4}{7}$=$\frac{7}{4}$	$\frac{5}{6}$×12=10	1÷0.125=8	$\frac{2}{3}$×$\frac{2}{3}$÷$\frac{2}{3}$×$\frac{2}{3}$=$\frac{4}{9}$

點評 解答此題應(yīng)熟練掌握并靈活運用小數(shù)和分?jǐn)?shù)四則運算的運算法則．