Question

2．直接寫(xiě)出得數(shù)

2.2+3.5=	34÷0.1=	0.8+1.3-0.8=	2.4×5=	16.5÷10%=
4-$\frac{2}{5}$=	$\frac{1}{2}$+$\frac{1}{3}$=	$\frac{6}{7}$÷3=	$\frac{1}{3}$-$\frac{1}{6}$=	$\frac{4}{5}$×4+$\frac{4}{5}$=

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0.8+1.3-0.8變形為0.8-0.8+1.3計(jì)算，$\frac{4}{5}$×4+$\frac{4}{5}$根據(jù)乘法分配律計(jì)算．

解答 解：

2.2+3.5=5.7	34÷0.1=340	0.8+1.3-0.8=1.3	2.4×5=12	16.5÷10%=165
4-$\frac{2}{5}$=3$\frac{3}{5}$	$\frac{1}{2}$+$\frac{1}{3}$=$\frac{5}{6}$	$\frac{6}{7}$÷3=$\frac{2}{7}$	$\frac{1}{3}$-$\frac{1}{6}$=$\frac{1}{6}$	$\frac{4}{5}$×4+$\frac{4}{5}$=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．