Questions: Whitney tried to evaluate an expression. Here is her work: 33+12 ÷ 2 ·(4-2+8) = 33+12 ÷ 2 ·(2+8) = step 1 = 33+12 ÷ 2 · 10 = step 2 = step 3 = 93 Is Whitney's work correct? No, Whitney made a mistake going from the given expression to Step 1. Whitney should have added 2 and 8 before subtracting. The order of operations says to add before you subtract. No, Whitney made a mistake going from Step 2 to Step 3. Whitney should have multiplied 2 and 10 before dividing. The order of operations says to multiply before you divide. Yes, Whitney's work is correct.

Transcript text: Whitney tried to evaluate an expression. Here is her work: \[ \begin{aligned} & 33+12 \div 2 \cdot(4-2+8) \\ = & 33+12 \div 2 \cdot(2+8) \\ = & \text { step } 1 \\ = & 33+12 \div 2 \cdot 10 \\ = & \text { step 2 } \\ = & \text { step 3 } \\ = & 93 \end{aligned} \] Is Whitney's work correct? No, Whitney made a mistake going from the given expression to Step 1. Whitney should have added 2 and 8 before subtracting. The order of operations says to add before you subtract. No, Whitney made a mistake going from Step 2 to Step 3. Whitney should have multiplied 2 and 10 before dividing. The order of operations says to multiply before you divide. Yes, Whitney's work is correct.