求这几道题的解,要完整过程。最好写在纸上发过来
2013-11-28
展开全部
1, C, 1/(1-20%) = 5/4
2, B, 原价 10/(1-80%) = 50, 50*80% = 40
3, A, 200x60% /(1+20%) = 100
4, 600 元,(25+5)/(75%-70%) = 600
5, 80 %, 1/(1+25%) = 0.8
6, 120 元, 150/(1+25%) = 120
2, B, 原价 10/(1-80%) = 50, 50*80% = 40
3, A, 200x60% /(1+20%) = 100
4, 600 元,(25+5)/(75%-70%) = 600
5, 80 %, 1/(1+25%) = 0.8
6, 120 元, 150/(1+25%) = 120
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