求救3道初一的数学计算题!
37.5+(28又5/7)+[(-46又1/2)+(-25又1/7)]
(-2又3/5)+(-1/4)+(-3又2/5)+(+2又3/4)+(-1又1/2)+(+1又1/3)
1又1/4+(-6.5)+3又3/8+(-1.25)+2又5/8
5/2*3/7-(-3/7)*11/2-(-1/2)*3/7