组织纪律性不强的表现:数学初一问题,高手来。
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(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