Question

初一上学期有理数的加法.1、(+1/2)+(-5/6)+(+1/3)+(-2/3)+12、1又1/4+（-3又1/3）+

Answer 1

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)=1/3

2、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