1. Splash Screen

2. Example 1: Translate Phrases into Expressions
Five-Minute Check
Then/Now
New Vocabulary
Example 1: Translate Phrases into Expressions
Key Concept: Order of Operations
Example 2: Evaluate Expressions
Example 3: Real-World Example: Write Expressions to Solve Problems
Lesson Menu

3. Find the value of the expression 1.8 + 0.6.
B. 2.4
C. 2.2
D. 1.4
5-Minute Check 1

4. Find the value of the expression 85.24 + 12.8.B C D
5-Minute Check 2

5. Find the value of the expression 114 – 2.9.B C D
5-Minute Check 3

6. Find the value of the expression 8 × 47.
B. 326
C. 372
D. 376
5-Minute Check 4

7. Find the value of the expression 72 ÷ 4.
B. 17
C. 18
D. 19
5-Minute Check 5

8. Cayce and Grantland each are reading the same 528-page book
Cayce and Grantland each are reading the same 528-page book. Cayce reads 16 pages a day while Grantland reads 22 pages. If the boys begin the book the same day, how much faster will Grantland finish reading the book?
A. 6 days
B. 7 days
C. 8 days
D. 9 days
5-Minute Check 6

9. You have already performed mathematical operations. (Previous Course)
Translate verbal phrases into numerical expressions.
Use the order of operations to evaluate expressions.
Then/Now

10. numerical expression
evaluate
order of operations
Vocabulary

11. Phrase the quotient of 18 and 6
Translate Phrases into Expressions
A. Write a numerical expression for the verbal phrase eighteen marbles divided equally among six friends.
Phrase the quotient of 18 and 6
Expression 18 ÷ 6
Answer: 18 ÷ 6
Example 1A

12. Translate Phrases into Expressions
B. Write a numerical expression for the verbal phrase the total number of photos if there are nine photos in the camera plus four more.
Phrase the sum of 9 and 4
Expression 9 + 4
Answer:
Example 1B

13. A. Write a numerical expression for the verbal phrase twenty dollars divided equally among five brothers.
A. 5 ÷ 20
B. 20 ÷ 5
C. 4 ÷ 20
D. 20 ÷ 4
Example 1A

14. B. Write a numerical expression for the verbal phrase the total number of DVDs if Sue has eight and gets five more. A B C
D. 13 – 5
Example 1B

15. Key Concept

16. A. Evaluate the expression 17 + 36 ÷ 9.
Evaluate Expressions
A. Evaluate the expression ÷ 9.
÷ 9 = Divide 36 by 9.
= 21 Add 17 and 4.
Answer: 21
Example 2A

17. B. Evaluate the expression 24 ÷ 8 × 3.
Evaluate Expressions
B. Evaluate the expression 24 ÷ 8 × 3.
Divide 24 by 8.
Multiply 3 and 3.
Answer: 9
Example 2B

18. C. Evaluate the expression 5(4 + 6) – 7 ● 7.
Evaluate Expressions
C. Evaluate the expression 5(4 + 6) – 7 ● 7.
Evaluate (4 + 6).
5(10) means 5 × 10.
7 ● 7 means 7 × 7.
Subtract 49 from 50.
Answer: 1
Example 2C

19. D. Evaluate the expression 3[(18 – 6) + 2(4)].
Evaluate Expressions
D. Evaluate the expression 3[(18 – 6) + 2(4)].
Evaluate (18 – 6).
Multiply 2 and 4.
Add 12 and 8.
Multiply 3 and 20.
Answer: 60
Example 2D

20. E. Evaluate the expression
Evaluate Expressions
E. Evaluate the expression
Rewrite as a division expression.
Evaluate ( ) and (19 – 14).
Divide 80 by 5.
Answer: 16
Example 2E

21. A. Evaluate the expression 36 + 12 ÷ 3.
B. 9
C. 16
D. 40
Example 2A

22. B. Evaluate the expression 63 ÷ 7 + 2.
C. 8
D. 11
Example 2B

23. C. Evaluate the expression 3(12 – 10) + 14 ÷ 2.
B. 20
C. 33
D. 10
Example 2C

24. D. Evaluate the expression 4[(3 + 8) – 2(4)].
B. 12
C. 144
D. 36
Example 2D

25. E. Evaluate the expressionB. C. D.
Example 2E

26. Write Expressions to Solve Problems
EARNINGS Madison earns an allowance of $5 per week. She also earns $8 per hour babysitting, and usually babysits 6 hours each week. Write and evaluate an expression for the total amount of money she earns in one week. Then make a table showing what she will earn if she babysits 7, 8, and 9 hours a week.
Understand You know how much Madison earns for her allowance. You need to find how much she earns for babysitting if she babysits for 6, 7, 8, and 9 hours a week.
Example 3

27. Solve First write an expression for babysitting 6 hours.
Write Expressions to Solve Problems
Plan Write an expression to find the amount she earns from babysitting for each number of hours. Organize the results in a table.
Solve First write an expression for babysitting 6 hours.
Example 3

28. Answer: Madison will earn $53 in one week if she babysits for 6 hours.
Write Expressions to Solve Problems
5 + 8 × 6 = Multiply.
= 53 Add.
Answer: Madison will earn $53 in one week if she babysits for 6 hours.
Make a table for 7, 8, and 9 hours.
Example 3

29. Write Expressions to Solve Problems
Check Look at the pattern in the earnings. As the number of hours increase by 1, the earnings increase by $8. 
Example 3

30. SHOPPING The Good Price Grocery Store advertises a special on 2-liter bottles of soft drinks. The first bottle purchased is $1.50 and each bottle after that is $1.20. Write and evaluate an expression for the total cost when 8 bottles are purchased.
A (1.20) = $11.10
B (1.20) = $9.90
C = $12.70
D (1.50) = $11.70
Example 3

31. End of the Lesson