By following the order of operations, or PEMDAS, you'll get the right answer.
PEMDAS:
(P)arenthesis
(E)xponent
(M)ultiplication
(D)ivision
(A)ddition
(S)ubtraction
To memorize:
(P)lease (E)xcuse (M)y (D)ear (A)unt (S)ally
In the equation 6 ÷ 2 (1 + 2)...
Do the problem in the (P)arenthesis first.
(1 + 2) is equal to 3.
6 ÷ 2 (3)
Next, since there's no (E)xponents, do (M)ultiplication.
2 (3) = 2 x 3 = 6.
6 ÷ 6
Finally, do (D)ivision.
6 ÷ 6 = 1.
The answer is 1.