Question

16．直接寫出得數(shù)

13.8-8=	16×0.3=	318÷3=	3.68-0.72-0.28=
$\frac{16}{9}÷\frac{2}{3}$=	1.25×0.8=	$\frac{3}{4}+\frac{1}{7}$=	$\frac{3}{5}×6÷\frac{3}{5}×6$=

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；
3.68-0.72-0.28根據(jù)減法的性質(zhì)進(jìn)行簡(jiǎn)算．

解答 解：

13.8-8=5.8	16×0.3=4.8	318÷3=106	3.68-0.72-0.28=2.68
$\frac{16}{9}÷\frac{2}{3}$=$\frac{8}{3}$	1.25×0.8=1	$\frac{3}{4}+\frac{1}{7}$=$\frac{25}{28}$	$\frac{3}{5}×6÷\frac{3}{5}×6$=36

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