Presentation on theme: "Lesson 1.3: Order of Operations Essential Question: How do you use Order of Operations to evaluate equations?"— Presentation transcript:
Lesson 1.3: Order of Operations Essential Question: How do you use Order of Operations to evaluate equations?
Key Vocabulary Order of Operations: the rules of which calculation comes first in an expression. Please Excuse My Dear Aunt Sally
Example 1 There are about 2,000 plants in each of the 50 stars of this flag. There are about 64,100 plants in each of the 7 short stripes and 106, 700 plants in each of the long stripes. The blue region contains about 198,900 plants. About how many plants are there total?
Example 3 Evaluate the expression when x=2 and y=5 a. 4(x+y) b. 3(x+y)²
Example 4 You buy a pattern and enough material to make two pillows. The pattern costs $5. Each pillow requires $3.95 worth of material and a button that costs $.75. Find the total cost. Total cost= cost of pattern+ # of pillows· cost of each pillow