1. To Start: 15 Points Evaluate: 3 + 4 * 6 – 2 3(6 +2) – 2 3{6 +(3 * 4)}
=25
=22
=54

2. Chapter 1: Algebraic Expressions and Integers
Section 1-3: Evaluating Expressions

3. Evaluating
You can Evaluate a variable expression by replacing each variable with a number. Then use the order of operations to simplify.

4. Practice #1 28!!!! 21!!!! Evaluate the following. 63 – 5x for x=7.
Substitute 7 in for x!
63 – 5(7) = ?
63 – 35 = ?
28!!!!
4y – 15 for y=9.
Substitute 9 in for y!
4(9) – 15 = ?
36 – 15 = ?
21!!!!

5. You Try!!! 5!!!! 45!!!! Evaluate the following. 4(t+3) + 1 for t=8.
Substitute 8 in for t!
4(8+3) +1= ?
4(11) + 1= ? =?
45!!!!
4m – 11 for m=4.
Substitute 4 in for m!
4(4) – 11 = ?
16 – 11 = ?
5!!!!

6. Practice #2 35!!!! Substitute for the variables!
Do order of operations!
Evaluate 3ab + c/2 for a=2, b=5, and c=10.
3(2)(5) + 10/2 = ?
6(5) + 5 = ?
= ?
35!!!!

7. 90!!!! You Try!!!! Evaluate 6(g + h) for g=8 and h=7. 6(8 + 7) = ?
6(15) = ?
90!!!!
Substitute for the variables!
Do order of operations!

8. You Try!!!! 23!!!! Substitute for the variables!
Do order of operations!
Evaluate 2xy – z for x=4, y=3, and z=1.
2(4)(3) - 1= ?
8(3) - 1= ?
24 – 1 = ?
23!!!!

9. Homework!!!!
Page 15:
1-7, 11-14, 17-26
1.1 Worksheet