4.56/（2.25+1.75）*10.4的简便计算!
问题描述：
4.56/（2.25+1.75）*10.4的简便计算!
答
4.56/(2.25+1.75)*10.4
=4.65/4*10.4
=4.65*(10.4/4)
=4.65*2.6
=12.09