13/25*14+14/25*12简便计算
问题描述：
13/25*14+14/25*12简便计算
答
13/25*14+14/25*12
=(13/25)*14+(12/25)*14;
=14*(13/25+12/25)
=14*1
=14;
答
13/25*14+14/25*12
=14/25x13+14/25x12
=14/25x(13+12)
=14/25x25
=14