Maria bought 3 boxes of crayons for 4 dollars each and 5 notebooks for 2 dollars each. Which pair of expressions represents the total cost?

$3 \cdot 4 + 5 \cdot 2$ and $4+4+4 + 2+2+2+2+2$

$(3+5) \cdot (4+2)$ and $3 \cdot 4 + 5 \cdot 2$

$3 \cdot 4 \cdot 5 \cdot 2$ and $4+4+4 + 2+2+2+2+2$

$3 \cdot (4+5) + 2$ and $3 \cdot 4 + 5 \cdot 2$

Order of Operations Practice — Grade 6 math