6.25+17.25+24.25+23.25+9.25+7.25怎么简算

问题描述:

6.25+17.25+24.25+23.25+9.25+7.25怎么简算

0.25*6+(6+17+24+23+9+9)

6+24+17+23+9+7+0.25*6=30+40+16+1.5=87.5