Big ideas math 3.1 Evaluating Expressions

Big ideas math 3.1 Evaluating Expressions

By Kayla Sellari

​Evaluating Algebraic Expressions

​Learning Objective...

• To use the order of operations to evaluate algebraic expressions.

Multiple Choice

Let's review. Evaluate the expression:

$$6^2-4\div2$$  

• 16

• 34

• 4

• 10

Multiple Choice

In the order of operations, which comes first?

• Exponents

• Addition

• Division

• Subtraction

​Order of Operations

When evaluating expressions, you need to always remember to follow the order of operations! You need to use this when solving any type of expression.

Multiple Choice

Evaluate the expression:

$$6\times2^2+3$$  

• 42

• 27

• 147

• 67

Multiple Choice

Evaluate the expression:

$$\left(8-5\right)\ \times12+3^2$$  

• 63

• 54

• 42

• 45

​Evaluating Expressions with Substitution

For the next questions, you will be evaluating expressions by substituting a given number for a variable.

​Evaluate k + 10 when k = 25

• k + 10 (Step 1: Write the expression)​

• 25 + 10​ (Step 2: Substitute value for the variable)

• 35​ (Step 3: Evaluate)

​Evaluate 4n when n = 12

4n​​

Multiple Choice

Evaluate 24 + c when c = 9

• 249

• 33

• 15

• 58

Multiple Choice

Evaluate d - 17 when d = 30

• 23

• 47

• 39

• 13

​Evaluate 3x - 14 when x = 5

3x - 14

​Evaluate p - q when p = 24 and q = 8

p - q​

Multiple Choice

Evaluate q + p when p = 24 and q = 8

• 3

• 32

• 16

• 10

Multiple Choice

Evaluate 5y + 1 when y = 6

• 31

• 11

• 57

• 45

Poll

Learning Objective: To use the order of operations to evaluate algebraic expressions.

• I'm feeling a little lost.

• I feel ok, but still need a little more practice.

• I feel confident and could teach it to a friend.