Question

Prove this a + (b + c) = (a +b) + c if

(i) a=8, b=3, c=5

(ii) a=18, b=2, c=3​

Answer 1

Answer:

Step-by-step explanation:

i) LHS=  8+(3+5) (always solve brackets first)

=> 8+8 = 16

RHS= (8+3)+5

=> 11+5 = 16

:. LHS=RHS

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ii) LHS= 18+(2+3)

=> 18+5 = 23

RHS=  (18+2)+3

=> 20+3=23

:. LHS=RHS

Answer 2

QUESTION: Prove this a + (b + c) = (a +b) + c if

(i) a=8, b=3, c=5

(ii) a=18, b=2, c=3​

ANSWER: a + (b + c) = (a +b) + c = Assosiative property

i]  a=8, b=3, c=5

so it will be

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

8 + (3 + 5) = (8 +3) + 5

First we will solve the LHS= 8 + (3 + 5)

= 8+ 8

=16

Now we will solve RHS = (8 +3) + 5

=11+5

=16

Hence verified LHS=RHS

ii]  a=18, b=2, c=3​

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

18 + (2 + 3) = (18 +2) + 3

First we will solve the LHS=  18 + (2 + 3)

= 18+5

=23

Now we will solve RHS = (18 +2) + 3

20+3

=23

Hence verified LHS=RHS