如题所述
第1个回答 2016-06-19
（272-67）x15/25
=205+x3/5
=（200+5）x3/5
=200x3/5+5x3/5
=120+3
=123追答
=205+x3/5
=（200+5）x3/5
=200x3/5+5x3/5
=120+3
=123追答
行家正解，你参考下
第2个回答 2016-06-19
(272-67)x15/25
=(272-67)x3/5
=105x3/5
=21x3
=63本回答被网友采纳
=(272-67)x3/5
=105x3/5
=21x3
=63本回答被网友采纳
