1. Splash Screen

2. Lesson Menu Five-Minute Check CCSS Then/Now New Vocabulary Key Concept: Order of Operations Example 1:Evaluate Algebraic Expressions Example 2:Evaluate Algebraic Expressions Example 3:Real-World Example: Use a Formula

3. CCSS Content Standards A.SSE.1.a Interpret parts of an expression, such as terms, factors, and coefficients. A.SSE.1.b Interpret complicated expressions by viewing one or more of their parts as a single entity. Mathematical Practices 1 Make sense of problems and persevere in solving them.

4. Then/Now You used the rules of exponents. Use the order of operations to evaluate expressions. Use formulas.

5. Vocabulary variables algebraic expressions order of operations formula

6. Concept

7. Example 1 Evaluate Algebraic Expressions Evaluate (x – y) 3 + 3 if x = 1 and y = 4. (x – y) 3 + 3=(1 – 4) 3 + 3x = 1 and y = 4 = (–3) 3 + 3Subtract 4 from 1. =–27 + 3Evaluate (–3) 3. =–24Add –27 and 3. Answer: –24

8. Example 1 A.3 B.4 C.6 D.–3 Evaluate f + g 2 – 3g if f = 5 and g = 2.

9. Example 2 Evaluate Algebraic Expressions A. Evaluate n – t(n 2 – t) if n = 2 and t = 3.4. n – t(n 2 – t)=2 – 3.4(2 2 – 3.4)n = 2 and t = 3.4 =2 – 3.4(4 – 3.4)Evaluate 2 2. =2 – 3.4(0.6)Subtract 3.4 from 4. =2 – 2.04Multiply 3.4 and 0.6. =–0.04Subtract 2.04 from 2. Answer: –0.04

10. Example 2 Evaluate Algebraic Expressions x = 5, y = –2, and z = –1 Answer:–9 Evaluate the numerator and the denominator separately. Multiply in the numerator. Simplify the numerator and the denominator. Then simplify the fraction. B.

11. Example 2a A.0 B.12 C.24 D.28 A. Evaluate a + b 2 (a – b) if a = 4 and b = –2.

12. Example 2b A.–1 B.–3 C.3 D.4 B.

13. Example 3 Use a Formula

14. Example 3 Use a Formula Answer: The area of the trapezoid is 152 square meters.

15. Example 3 A.450 cm 3 B.75 cm 3 C.50 cm 3 D.10 cm 3

16. End of the Lesson