有理数加减混合运算:(-2又2/5)-(-4.7)-(+0.5)+(+2.4)+(-3.2)(使计算简便)

问题描述:

有理数加减混合运算:(-2又2/5)-(-4.7)-(+0.5)+(+2.4)+(-3.2)(使计算简便)

(-2又2/5)-(-4.7)-(+0.5)+(+2.4)+(-3.2)
=(2.4-2.4)+(4.7-3.2-0.5)
=0+1
=1