Exercise 1 Page 190

According to the order of operations, expressions inside parentheses are evaluated first, followed by exponents, then multiplication and division, and finally addition and subtraction are evaluated last. We can use the acronym PEMDAS to help us remember the correct order!

For the given expression, this means evaluating the expression inside the parentheses completely before dividing by the sum. 54 ÷ (6+3) Let's do it!

Operation	Before Simplification	After Simplification
Add terms	54 ÷ (6 + 3)	54 ÷ 9
Divide	54 ÷ 9	6

The expression is equal to 6.