Question

口算

0.07×0.8=	1.7×0.03=	0.16×0.5=	4.5×0.03=
0.72÷12=	5.2÷13=	0.7×1.1=	9.6÷0.6=
0÷3.68=	0.48÷0.03=	2.5×8=	2.33×0.2×5=
0.3×0.2=	2.4×10=	4.2÷0.7=	3.6÷12=
1.2×5=	9.1÷0.7=	15×0.6=	0.8-0.35=
0.78÷0.3=	0.25×4=	7.5÷0.15=	100×0.74=

Answer 1

考點(diǎn)：小數(shù)乘法,整數(shù)的加法和減法

專題：計(jì)算題

分析：本題根據(jù)小數(shù)的加法、減法、乘法與除法的運(yùn)算法則計(jì)算即可．

解答：

解：0.07×0.8=0.056	1.7×0.03=0.051	0.16×0.5=0.08	4.5×0.03=0.135
0.72÷12=0.06	5.2÷13=0.4	0.7×1.1=0.77	9.6÷0.6=16
0÷3.68=0	0.48÷0.03=16	2.5×8=20	2.33×0.2×5=2.33
0.3×0.2=0.06	2.4×10=24	4.2÷0.7=6	3.6÷12=0.3
1.2×5=6	9.1÷0.7=13	15×0.6=9	0.8-0.35=0.45
0.78÷0.3=2.6	0.25×4=1	7.5÷0.15=50	100×0.74=74

點(diǎn)評：完成小數(shù)加減法時(shí)要注意小數(shù)點(diǎn)對齊，完成小數(shù)乘除法時(shí)要注意小數(shù)點(diǎn)位置的變化．