0.45×0.45+0.45×0.55简便计算
0.45×0.45+0.45×0.55简便计算
数学人气:917 ℃时间:2020-02-04 20:49:35
优质解答
0.45×0.45+0.45×0.55=0.45(0.45+0.55)=0.45
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