3. Simplify: \( (18 \div 3)+(9 \times 2)-6= \)

To simplify the expression, let's break it down step by step. First, \( 18 \div 3 = 6 \). Next, \( 9 \times 2 = 18 \). So now, the expression looks like \( 6 + 18 - 6 \). Adding \( 6 + 18 \) gives us \( 24 \), and then subtracting \( 6 \) results in \( 18 \). Therefore, the simplified answer is \( 18 \). Another way to see it is by employing the order of operations. We handled the division and multiplication first before addition and subtraction from left to right. This approach ensures accuracy by following PEMDAS/BODMAS rules, which can often save you from simple mistakes! Always remember to treat multiplication and division at the same level, just like addition and subtraction, moving from left to right in your calculations.