How do I know where to begin?

1. One batch of cupcakes calls for 2 cups of sugar, and one batch of cookies calls for 3 cups of sugar. Nicole wants to make 7 batches of each. How many cups of sugar will she use? 7 x (2 + 3) How do I know where to begin?

2. In this lesson you will learn to evaluate an expression by interpreting parentheses as “do this first.”

3. …but I know there is a required order of operations to follow The first operation I see is subtraction… 25 - 12 _ 3 x 6

4. 25 - 12 _ 3 x 6 25 - 4 x 6 25 - 4 x 6 25 - 24 1 25 - 12 _ 3 x 6 = 1

5. One batch of cupcakes calls for 2 cups of sugar, and one batch of cookies calls for 3 cups of sugar. Nicole wants to make 7 batches of each. How many cups of sugar will she use? 7 x (2 + 3)

6. 2 7 x ( + ) 3

7. 7 x (2 + 3) 7 x (2 + 3) 7 x (Do this first!) 7 x (2 + 3) = 35 7 x (5)

8. Bob had $30 to pay for his breakfast and lunch on a two day trip. Each day he spent $3 on breakfast and $7 on lunch. How much money did he have left at the end of the trip? 30 - [(3 + 7) x 2]

9. Bob’s money - breakfast and lunch x 2 days $30 x 2 - $3 + $7 ( ) $30 - [($3 + $7) x 2] Total amount Bob spent

10. Do I multiply first? 30 - [(3 + 7) x 2] Do this first!

11. Parentheses ( ) 30 - [(3 + 7) x 2] 30 - [(10) x 2] 30 - [10 x 2] Brackets [ ] 30 - 20 30 -20 = 10

12. In this lesson you have learned to evaluate an expression by interpreting parentheses as “do this first.”