8分之5×15+8分之3×23简便运算
问题描述：
8分之5×15+8分之3×23简便运算
答
8分之5×15+8分之3×23
=（5x15+3x23）/8
=(5x5x3+3x23)/8
=3x(25+23)/8
=3x48/8(分子分母约去8，）
=18
答
8分之5×15+8分之3×23
=1/8x75+1/8x69
=1/8x(75+69)
=1/8x144
=18