0.027+9.9×0.27
=0.27x0.1+0.27x9.9
=0.27x(0.1+9.9)
=0.27x10
=2.70.27x0.1这什么意思。能解释一下么。方便简算。后面的是0.27这样才能方便提取公因式。
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