Variables Represent Unknowns
Grade 4β’45 minutesβ’5.PFA.2 The student will investigate and use variables in contextual problems.
Learning Objective
I can explain that a variable, like a letter or a shape, is used to represent an unknown number in a real-world problem, such as calculating the total cost when the price of each item is unknown.
Practice Questions
This lesson includes 7 practice questions to reinforce learning.
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1. Explain in your own words what a variable is and why we use them in math problems.
2. Give an example of a real-world situation where you might use a variable to represent an unknown number.
3. In the expression 5 + π₯, what could π₯ represent? Give two different possible values for π₯ and explain what the expression would equal in each case.
...and 4 more questions
Educational Video
Variables, Expressions, and Equations | Math with Mr. J
Math with Mr. J