Question

口算 2.4+0.73=	3.08×4=	537-99=	2.6×0.3=
3-0.71-0.19=	8-0.19=	130×5=	8-0.07=
0.125×8=	7.3÷8÷0.125=	0.54÷0.9=	4.08÷0.02=
8.4÷0.21=	1.5×17×0.2=	2.7×4+2.3×4=	19×16=
8.7÷0.29=	0.06÷0.5=	32+7.2+0.8=	3.6+13.5+1.4=

Answer 1

考點(diǎn)：小數(shù)的加法和減法,小數(shù)乘法,小數(shù)除法,小數(shù)四則混合運(yùn)算

專題：計(jì)算題

分析：根據(jù)四則運(yùn)算的計(jì)算法則進(jìn)行計(jì)算即可求解．注意3-0.71-0.19根據(jù)減法的性質(zhì)計(jì)算，1.5×17×0.2根據(jù)乘法交換律和結(jié)合律計(jì)算，2.7×4+2.3×4，19×16根據(jù)乘法分配律計(jì)算，32+7.2+0.8根據(jù)加法結(jié)合律計(jì)算，3.6+13.5+1.4根據(jù)加法交換律和結(jié)合律計(jì)算．

解答： 解：

2.4+0.73=3.13	3.08×4=12.32	537-99=438	2.6×0.3=0.78
3-0.71-0.19=2.1	8-0.19=7.81	130×5=650	8-0.07=7.93
0.125×8=1	7.3÷8÷0.125=7.3	0.54÷0.9=0.6	4.08÷0.02=204
8.4÷0.21=40	1.5×17×0.2=5.1	2.7×4+2.3×4=20	19×16=304
8.7÷0.29=30	0.06÷0.5=0.12	32+7.2+0.8=40	3.6+13.5+1.4=18.5

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．