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8.1÷0.9=0.65÷1.3=
0.36÷O.4=3.6×2=
4.5×O.2=8.65+1.5=
 0.32÷1.6=7.5÷1.5=

解:

8.1÷0.9=9,0.65÷1.3=0.5,
0.36÷O.4=0.9,3.6×2=7.2,
4.5×O.2=0.9,8.65+1.5=10.15,
 0.32÷1.6=0.2,7.5÷1.5=5.

分析:根据小数加减乘除法的计算方法进行计算.
点评:口算时,注意运算符号和数据,然后再进一步计算.
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