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4.5×0.1÷4.5×0.1=(  )
分析:根据题意,应从它们的运算顺序进行计算,4.5×0.1÷4.5×0.1,只有乘除两种运算符号,应按照从左向右的顺序进行计算;也可以带着每个数前的符号,由乘法交换律进行简算.
解答:解:根据题意可得:
方法一:
4.5×0.1÷4.5×0.1,
=0.45÷4.5×0.1,
=0.1×0.1,
=0.01;

方法二:
4.5×0.1÷4.5×0.1,
=4.5÷4.5×0.1×0.1,
=1×0.1×0.1,
=0.01.

故选:B.
点评:像此种类型的题目计算,要先分析好运算顺序,然后再进行计算即可.
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