Evaluating Expressions

Evaluating Expressions

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Multiple Choice

Evaluate the expression:

$$6^2-4\div2$$  

• 4

• 34

• 16

• 10

Multiple Select

In the order of operations, which one comes first?

• Exponents

• Addition

• Multiplication

Open Ended

What is the full order of operations?

Here is the order of operations

What does left to right mean on M/D and A/S?

Let's dive in and start evaluating some expressions!

The next several slides are numeric expressions. Remember: to evaluate a numeric expression you use the order of operations to simplify it to a single value.

Multiple Choice

Evaluate the expression.

$$6\cdot2^2+3$$  

• 42

• 27

• 67

• 142

Multiple Choice

Evaluate the expression.

$$\left(8-5\right)\cdot12+3^2$$  

• 54

• 42

• 63

• 45

Multiple Choice

Which student correctly used the order of operations while solving this problem?

Let's take a look at algebraic expressions now!

The next slides are algebraic expressions. Remember: to evaluate an algebraic expression, start by substituting in the value of the variable. Then follow the order of operations to simplify to a single number. video tutorial: https://www.youtube.com/watch?v=kS4H-DOIhAE

Some algebraic expressions have more than one variable!

Just substitute in both variable values at the beginning of the problem.

Multiple Choice

Evaluate $$a-5-b$$ when a = 4 and b = 10. 

• 1

• -9

• -11

• 9

Multiple Choice

Evaluate $$\frac{16+2x}{y+1}$$ when x = -2 and y = -4 

• -4

• 5

• 2

• -6

Open Ended

If you were to be given a test on evaluating expressions right now, what do you think your score be? Why?