Question

直接寫出得數(shù) 231+99=	35×10%=	3030÷30=
3 4 + 1 4 =	15× 1 5 ÷ 1 5 × 2 3 =	0.5×（2.8-2.6）=
0÷ 3 5 × 6 17 =

Answer 1

分析：根據(jù)整數(shù)、百分?jǐn)?shù)、小數(shù)和分?jǐn)?shù)加減乘除法的計(jì)算方法進(jìn)行計(jì)算．

解答：解：

231+99=330	35×10%=3.5	3030÷30=101
3 4 + 1 4 =1	15× 1 5 ÷ 1 5 × 2 3 =10	0.5×（2.8-2.6）=0.1
0÷ 3 5 × 6 17 =0．

點(diǎn)評：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．