3.69×43+36.9+3.69×57简便计算

3.69×43+36.9+3.69×57简便计算


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第1个回答  2016-10-17
3.69×43+36.9+3.69×57
=3.69x(43+57)+36.9
=3.69x100+36.9
=369+36.9
=405.9