初一上学期有理数的加法.

问题描述:

初一上学期有理数的加法.
1、(+1/2)+(-5/6)+(+1/3)+(-2/3)+1
2、1又1/4+(-3又1/3)+(-4又3/4)+(+2又2/3)

1、(+1/2)+(-5/6)+(+1/3)+(-2/3)+1=(1/2)-(5/6)+(1/3)-(2/3)+1=(3/6)-(5/6)+(2/6)-(4/6)+(6/6)=1/32、1又1/4+(-3又1/3)+(-4又3/4)+(+2又2/3)=5/4-(10/3)-(19/4)+(8/3)=-14/4-(2/3)=-21/6-(4/6)=-25/6...