Question

直接寫出得數(shù)． 0.12×0.6=	4.5+0.76=	2x+0.7x=	7.5×0.4=	9.6÷0.06=
a+2.5a=	1.05÷0.01=	10-1.4-8.6=	2.5×0.4÷2.5×0.4=	7.23×9+7.23=

Answer 1

考點(diǎn)：小數(shù)的加法和減法,小數(shù)乘法,小數(shù)除法

專題：運(yùn)算順序及法則

分析：根據(jù)小數(shù)四則運(yùn)算的計(jì)算法則進(jìn)行計(jì)算即可求解．注意10-1.4-8.6根據(jù)減法的性質(zhì)計(jì)算，2.5×0.4÷2.5×0.4變形為（2.5÷2.5）×（0.4×0.4）計(jì)算，7.23×9+7.23根據(jù)乘法分配律計(jì)算．

解答： 解：

0.12×0.6=0.072	4.5+0.76=5.26	2x+0.7x=2.7x	7.5×0.4=3	9.6÷0.06=160
a+2.5a=3.5a	1.05÷0.01=105	10-1.4-8.6=0	2.5×0.4÷2.5×0.4=0.16	7.23×9+7.23=72.3

點(diǎn)評：考查了四則運(yùn)算，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．