(+25/4)+(+1/2)+(-6.25)+(+1/3)+(-7/9)+(-5/6)

问题描述:

(+25/4)+(+1/2)+(-6.25)+(+1/3)+(-7/9)+(-5/6)

(+25/4)+(+1/2)+(-6.25)+(+1/3)+(-7/9)+(-5/6)
原式=[(+25/4)+(-6.25)]+[(+1/3)+(+1/2)+(-5/6)])+(-7/9)
=0+0+(-7/9)
=-7/9