2007/2006*5/7减502/1003*5/7
问题描述:
2007/2006*5/7减502/1003*5/7
答
2007/2006*5/7-502/1003*5/7
=5/7*(2007/2006-502/1003)
=5/7*(2007/2006-1004/2006)
=5/7*(1003/2006)
=5/7*1/2
=5/14