31+(-4分之五)+0.25怎么算

问题描述:

31+(-4分之五)+0.25怎么算

31-1.25+0.25=30

31+(-5/4)+0.25 =31-5/4+0.25 =31-5/4+1/4 =31-(5/4-1/4) =31-1 =30