Question

verify x+(y+z) =(x+y)+z for x= -1/2, y= 2/5, z= -1/3

Answer 1

by applying associative law
we can prove that
(x+y)+z=x+(y+z)

(-1/2+2/5)-1/3=-1/2+(2/5-1/3)
-13/30=-13/30

hence proved