女人一旦有了猫的性格:数学初一问题,高手来。
来源:百度文库 编辑:高考问答 时间:2024/05/10 19:25:09
(1)已知a:b:c=2:3:5。求(10a+12b+5c)÷(a+b+c)值
a:b:c=2:3:5
A=2K B=3K C=5K
(10a+12b+5c)÷(a+b+c)=(20K+36K+25K)/(2K+3K+5K)
=8.1
a:b:c=2:3:5
A=2K B=3K C=5K
(10a+12b+5c)÷(a+b+c)=(20K+36K+25K)/(2K+3K+5K)
=8.1