Question

16．直接寫得數(shù)．

4+1.06=	1-$\frac{6}{7}$=	3.6×$\frac{3}{4}$=	2.8÷0.04=
0.24÷0.006=	0.418×100=	0.25×12=	$\frac{9}{11}$-（$\frac{2}{5}$-$\frac{2}{11}$）=

Answer 1

分析 根據(jù)小數(shù)和分?jǐn)?shù)加減乘除法的計(jì)算方法進(jìn)行計(jì)算．
$\frac{9}{11}$-（$\frac{2}{5}$-$\frac{2}{11}$）根據(jù)減法的性質(zhì)進(jìn)行簡算．

解答 解：

4+1.06=5.06	1-$\frac{6}{7}$=$\frac{1}{7}$	3.6×$\frac{3}{4}$=2.7	2.8÷0.04=70
0.24÷0.006=40	0.418×100=41.8	0.25×12=3	$\frac{9}{11}$-（$\frac{2}{5}$-$\frac{2}{11}$）=$\frac{3}{5}$

點(diǎn)評 口算時，注意運(yùn)算符號和數(shù)據(jù)，然后再進(jìn)一步計(jì)算．