(7/9-5/6+1/8)*18-1.45*6+39.5*6
问题描述：
(7/9-5/6+1/8)*18-1.45*6+39.5*6
答
(7/9-5/6+1/8)*18-1.45*6+39.5*6
=(7/9)*18-(5/6)*18+(1/8)*18+(39.5-1.45)*6
=14-15+2.25+38.05*6
=1.25+228.3
=229.55