1. Slide

60 seconds

Evaluating Variable Expressions

Variable expressions are mathematical statements that include one or more variables. To evaluate a variable expression, substitute a number for each variable and simplify the expression. Make sure the final answer is in the same form as the original expression.

2. Slide

60 seconds

Some things to know

How to use fractions and decimals in your calculator

Order of Operations: a set of rules that determine the sequence in which operations are performed when evaluating an expression

Exponents!

3. Slide

60 seconds

Evaluating Variable Expressions

In evaluating variable expressions, we substitute the values of the variables and perform the operations. The result is a numerical value. For example, if x = 3, then 2x + 5 would be evaluated as 2(3) + 5 = 11.

4. Slide

60 seconds

5. Personalised Feedback

360 seconds

Simplify the expression 3x - 2y + 5z when x = 2, y = 4, and z = 1.

6. Open question

300 seconds

How can you check your answer to make sure it is correct?

7. Drawings

450 seconds

Draw a pizza flying through outer space with pepperoni-shaped UFOs chasing after it

8. Personalised Feedback

360 seconds

If x = 3 and y = 5, evaluate the expression 2x + 3y.

9. Personalised Feedback

360 seconds

If x = 3 and y = 5, evaluate the expression: 5y - 4x^2

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