2.14乘6.5加2.14乘2.5加2.14的简便计算
问题描述:
2.14乘6.5加2.14乘2.5加2.14的简便计算
答
2.14*6.5+2.14*2.5+2.14
=2.14*(6.5+2.5+1)
=2.14*10
=21.4