1. Algebra 1A Vocabulary 1-2 Part 2
You evaluate an algebraic expression by replacing each variable with a given number. Then, simplify the expression using the order of operations.
For example,

2. Simplify and use Order of Operations

3. Sample Problems
What is the value of each expression when a = 3 and b = 4?

4. Evaluating a Real-World Expression
The shipping cost for an order at an online store is one tenth of the cost of the items you order. What is an expression for the total cost of a given order? What are the total costs for orders of $43, $79, $95, and $103?
THINK: How can you use a model to solve this problem?
MODEL:

5. Evaluating a Real-World Expression
DEFINE: Let c = the cost of the items
WRITE: Total cost = _________ /10 x_________

6. Use the Formula to Complete the Table

7. Error Analysis
The student made an error in simplifying the expression below. Find the error and simplify the expression correctly.