作业帮(-7又2/3)+(+4又1/2)-1/2= 49又1/7+(-77.21+(-22.79)=
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/13 14:49:35
(-7又2/3)+(+4又1/2)-1/2= 49又1/7+(-77.21+(-22.79)=
(-7又2/3)+(+4又1/2)-1/2= 49又1/7+(-77.21+(-22.79)=
(-7又2/3)+(+4又1/2)-1/2= 49又1/7+(-77.21+(-22.79)=
(-7又2/3)+(+4又1/2)-1/2
= -23/3+4+1/2-1/2
=-11/3
49又1/7+(-77.21+(-22.79)
=49+1/7-(100)
=-51+1/7
=-50又6/7