Question

8．直接寫出的數(shù)．

12×（$\frac{1}{4}$+$\frac{1}{6}$）=	12÷$\frac{1}{6}$=	$\frac{1}{5}$×8=	435+199=
16×0.2=	4×0.25=	2-2÷5=	$\frac{1}{2}$-$\frac{1}{4}$=

Answer 1

分析 根據(jù)小數(shù)和分?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12×（$\frac{1}{4}$+$\frac{1}{6}$）根據(jù)乘法分配律計(jì)算．

解答 解：

12×（$\frac{1}{4}$+$\frac{1}{6}$）=5	12÷$\frac{1}{6}$=72	$\frac{1}{5}$×8=1.6	435+199=634
16×0.2=3.2	4×0.25=1	2-2÷5=1.6	$\frac{1}{2}$-$\frac{1}{4}$=$\frac{1}{4}$

點(diǎn)評(píng) 考查了小數(shù)和分?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．