0.1-0.1×+(+0.1-0.1×0.1+)可以巧算吗?
3个回答
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0.1-0.1x+(0.1-0.1×0.1)
=0.1-0.1x+0.1-0.01
=0.2-0.1x-0.01
=0.19-0.1x
=0.1-0.1x+0.1-0.01
=0.2-0.1x-0.01
=0.19-0.1x
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展开全部
0.1-0.1×+(+0.1-0.1×0.1+)
=0.1-0.1×(0.1-0.1×0.1)
=0.1-0.1×(0.1-0.01)
=0.1-0.1×0.09
=0.1-0.009
=0.091
=0.1-0.1×(0.1-0.1×0.1)
=0.1-0.1×(0.1-0.01)
=0.1-0.1×0.09
=0.1-0.009
=0.091
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