Answer
Division is not associative.
Work Step by Step
Division is associative if for all real numbers $a, b$ and $c$:
$(a \div b) \div c = a \div (b \div c)$.
When $a=6, b=1,$ and $c=2$:
$(a \div b) \div c = (6 \div 1) \div 2 = 6 \div 2 = 3$
while
$a \div (b \div c) = 6 \div (1 \div 2) = 6 \div \frac{1}{2} = 12$
Note that
$(a \div b) \div c \ne a \div (b \div c)$
Therefore, division is not associative.
