0.75+0.125+(-2又3/4)+(-4又1/8)=?

问题描述:

0.75+0.125+(-2又3/4)+(-4又1/8)=?

分部做:(-2又3/4)=2又3/4=2.75 (-4又1/8)=4又1/8=4.125那么就可以看做是:0.75+0.125+2.75+4.125继续分部:0.75+2.75=3.5 0.125+4.125=4.253.5+4.25=7.75所以:0.75+0.125+(-2又3/4)+(-4又1/8)=7...