Question

16．直接寫(xiě)出得數(shù)

11.5÷0.05	$\frac{3}{8}$÷$\frac{8}{3}$	$\frac{1}{5}$-$\frac{1}{5}$÷2	$\frac{1}{3}$×$\frac{1}{2}$÷$\frac{1}{2}$×$\frac{1}{3}$
1040-104	0.1×0.1	$\frac{7}{12}$：$\frac{21}{24}$	40×30%

Answer 1

分析 小數(shù)的除法變成整數(shù)除法計(jì)算，分?jǐn)?shù)的除法變成分?jǐn)?shù)的乘法計(jì)算，整數(shù)乘百分?jǐn)?shù)要按照分?jǐn)?shù)的乘法計(jì)算，整數(shù)的加減法的計(jì)算要對(duì)齊數(shù)位，求比值的計(jì)算要變成除法計(jì)算，有乘除法又有加減法要先算乘除法再算加減法，只有乘除法的算式要從左往右計(jì)算．

解答 解：

11.5÷0.05=230	$\frac{3}{8}$÷$\frac{8}{3}$=$\frac{9}{64}$	$\frac{1}{5}$-$\frac{1}{5}$÷2=$\frac{1}{10}$	$\frac{1}{3}$×$\frac{1}{2}$÷$\frac{1}{2}$×$\frac{1}{3}$=$\frac{1}{9}$
1040-104=936	0.1×0.1=0.01	$\frac{7}{12}$：$\frac{21}{24}$=$\frac{2}{3}$	40×30%=12

點(diǎn)評(píng) 考查了四則運(yùn)算，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．