(2.4+2.1乘以2又七分之四)乘以(1除以1.25+0.2)-2.19=多少

问题描述:

(2.4+2.1乘以2又七分之四)乘以(1除以1.25+0.2)-2.19=多少

(2.4+5.4)*(0.8+0.2)-2.19=5.61

5.61