Question

Verify that a + (b + c) = (a + b) + c by taking a = -4/5, b= 7/8 and c = 3/4

Answer 1

Let x = 0.142857142857 …………………..(i)

On multiplying both sides of Eq. (i) by 1000000, we get

1000000 x = 142857.142857…………………………(ii)

On subtracting Eq. (i) from Eq. (ii), we get

1000000 x – x = (142857.142857…) – (0.142857..) ⇒ 999999 x = 142857

∴ x = 142857/

Answer 2

Answer:

(a+b)+c=a+(b+c)

[-7+(-8)]+5=-7+(-8+5)

(-7-8)+5=-7+(-3)

-15+5=-7-3

-10=-10