Question

11．

直接寫出得數(shù) 7.2+2.8=	0.96÷0.3=	9.9÷99=
1.2×0.25=	8.4÷0.42=	0.5×1.6×0=
0.25×44=	1÷0.01=	9-0.22=
4.2÷0.14=	10÷0.4=	4.8+0.3=
3.6÷0.04=	0.9÷0.45=	0.04÷1=
10÷0.4=	0.1×0.1×0.1=	0.2×0.25÷0.2×0.5=
15÷1.5+15=	2.4÷4+5.6÷4=

Answer 1

分析 根據(jù)小數(shù)加減乘除法的計算方法進行計算．

解答 解：

7.2+2.8=10	0.96÷0.3=3.2	9.9÷99=0.1
1.2×0.25=0.3	8.4÷0.42=20	0.5×1.6×0=0
0.25×44=11	1÷0.01=100	9-0.22=8.78
4.2÷0.14=30	10÷0.4=25	4.8+0.3=5.1
3.6÷0.04=90	0.9÷0.45=2	0.04÷1=0.04
10÷0.4=25	0.1×0.1×0.1=0.001	0.2×0.25÷0.2×0.5=0.125
15÷1.5+15=25	2.4÷4+5.6÷4=2

點評 口算時，注意運算符號和數(shù)據(jù)，然后再進一步計算．