5/8*69又10/17+1/8*50+7/8*5/17
问题描述:
5/8*69又10/17+1/8*50+7/8*5/17
答
原式=[5*(69*17+10)+1*50*17+7*5]/(8*17)=(5915+850+35)/136=6800/136=50
5/8*69又10/17+1/8*50+7/8*5/17
原式=[5*(69*17+10)+1*50*17+7*5]/(8*17)=(5915+850+35)/136=6800/136=50