7.4-23+4.8-5.9+13-4.1简算
问题描述：
7.4-23+4.8-5.9+13-4.1简算
答
7.4-23+4.8-5.9+13-4.1=(7.4+4.8)+(13-23)-(5.9+4.1)
=12.2-10-10
=2.2-10
=-7.8