(-205)+400 3/4+(-204 2/3)+(-1 1/2)=?
问题描述:
(-205)+400 3/4+(-204 2/3)+(-1 1/2)=?
答
(-205)+400 3/4+(-204 2/3)+(-1 1/2)
=(400-205-204-1)+(3/4-2/3-1/2)
=0+2/3-1/2
=1/6=0+2/3-1/2
这组数那来的