Question

. If a = -6, b = 2 and c = -5, verify
(a) (a + b) + c = a + (b + c)
(c) a + b = b + a
(b) a - (-b) = a + b
(d) a - c #c-a​

Answer 1

a) (-6+2)+(-5) = -6+(2+-5)
-4-5 = -6-3
-9 = -9
c) -6+2 = 2+(-6)
-4 = -4
b) -6-(-2) = -6+2
-6+2 = -4
-4 = -4
d) -6-(-5) = -5-(-6)
-6-5 = -5-6
-11 = -11