3.52-0.48*12
=8*0.44-8*0.72
=8*（0.44-0.72)
=-8*0.28
=-2.24首先谢谢哈,能告诉我8怎么来的吧,还有就是我的原题是:(3.52-0.45*1.2)3.52=8*0.440.48*12=8*0.06*12=8*0.72