Algebra Variable Expression Activity 1: Write each as an algebraic variable expression. Click ‘Read More’ button to see what keyboard signs should be used as operators.
Use the following signs in your keyboard as the operators.
Sum or Total: +
Difference: –
Product: x
Quotient: /
Learn what variables are and practice using them in expressions. A letter or symbol used to represent a quantity that can change is a variable. Any letter can be used as a variable. Most commonly used letters are x and y.
1 
the difference of 8 and 3 

2 
q increased by 21 

3 
x decreased by 10 

4 
the sum of p and 6 

5 
the product of a and 3 
