Question

直接寫出結(jié)果 2.5×40=	1.25×80=	9÷45=	10-0.1=
88÷0.88=	9.8+1.12=	6.1-0.01=	0.9×0.01=
8×0.45=	0.5+1÷0.5=	0.2×3÷0.2×3=	0.3×0.14=

Answer 1

考點(diǎn)：小數(shù)乘法,小數(shù)的加法和減法

專題：運(yùn)算順序及法則

分析：根據(jù)小數(shù)加減乘除法的計(jì)算方法解答即可．

解答： 解：

2.5×40=100	1.25×80=100	9÷45=0.2	10-0.1=9.9
88÷0.88=100	9.8+1.12=10.92	6.1-0.01=6.09	0.9×0.01=0.009
8×0.45=3.6	0.5+1÷0.5=2.5	0.2×3÷0.2×3=9	0.3×0.14=0.042

點(diǎn)評(píng)：口算時(shí)，注意數(shù)據(jù)特點(diǎn)和運(yùn)算符號(hào)，細(xì)心解答即可．