1.58*0.58+0.42*0.42+1.16*0.42
=1.58*0.58+0.42*（0.42+1.16）
=1.58*0.58+0.42*1.58
=1.58*（0.58+0.42）
=1.58*1
=1.58
1.58*0.58+0.42*0.42+1.16*0.42怎样简算 1.58*0.58+0.42*0.42+1.16*0.42怎样简算
1.58*0.58+0.42*0.42+1.16*0.42怎样简算 1.58*0.58+0.42*0.42+1.16*0.42怎样简算
数学人气：780 ℃时间：2020-03-26 01:18:40
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