Question

to evaluate this expression, what should be done first?
$6 + 9 \div 3 \cdot 4 - 1$
\bigcirc add $6 + 9$.
\bigcirc divide $9 \div 3$.
\bigcirc subtract $4 - 1$.
\bigcirc multiply $3 \cdot 4$.

Explanation:

Step1: Recall Order of Operations

The order of operations (PEMDAS/BODMAS) states that we perform division and multiplication from left to right before addition and subtraction.

Step2: Analyze the Expression

In the expression \(6 + 9\div3\times4 - 1\), we look at the operations: division (\(9\div3\)), multiplication (\(3\times4\)), addition (\(6 + \dots\)), and subtraction (\(\dots - 1\)). From left to right, the first operation among division and multiplication is \(9\div3\). So we should do the division \(9\div3\) first.

Answer:

Divide \(9\div3\) (the option with "Divide \(9\div3\)")