Why aren't we using the multiplication sign? | Introduction to algebra | Algebra I | Khan Academy
Khan Academy・2 minutes read
Variables in mathematics are commonly represented by symbols like "x," but other letters and Greek symbols can also be used. Different notations, such as "2 dot x" or writing the number and variable next to each other in parentheses, can help avoid confusion between variables and multiplication symbols. When evaluating expressions with variables and numbers, remember that the multiplication operation takes precedence over addition or subtraction for the correct answer.
Insights
- Different symbols can represent variables in mathematics, with "x" being the most popular choice, alongside other letters and Greek symbols.
- To prevent confusion between variables and multiplication symbols, alternate notations like "2 dot x" or placing the number and variable together in parentheses can be utilized.
Get key ideas from YouTube videos. It’s free
Recent questions
What is the most common variable symbol in mathematics?
"x"
How can confusion between variables and multiplication symbols be avoided?
Use different notations like "2 dot x" or parentheses.
What takes precedence in evaluating expressions with variables?
Multiplication operation over addition or subtraction.
Related videos
TED-Ed
Where do math symbols come from? - John David Walters
Khan Academy
Why all the letters in algebra? | Introduction to algebra | Algebra I | Khan Academy
Khan Academy
How to evaluate expressions with two variables | 6th grade | Khan Academy
Trinity White
JIT 1.1-1.3
The Organic Chemistry Tutor
Translating Words To Algebraic Expressions Explained!