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4×0.25=0.86×0.1=0.74×10=15.2-5=
6.2÷2=3.8+6.2=7.2÷8=5.6+0.8=
0.02×0.5=0.75×0.2=0.69+0.3=9.1÷7=

解:

4×0.25=1,0.86×0.1=0.086,0.74×10=7.4,15.2-5=10.2,
6.2÷2=3.1,3.8+6.2=10,7.2÷8=0.9,5.6+0.8=6.4,
0.02×0.5=0.01,0.75×0.2=0.15,0.69+0.3=0.99,9.1÷7=1.3.

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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