6.75-(-1/2)+(-14/3)+(-0.5)+(-6又3/4)

问题描述:

6.75-(-1/2)+(-14/3)+(-0.5)+(-6又3/4)

6.75-(-1/2)+(-14/3)+(-0.5)+(-6又3/4)
=6.75+1/2-14/3-0.5-6又3/4
=(6.75-6又3/4)+(1/2-0.5)-14/3
=0+0-14/3
=-14/3