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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