Writing basic expressions with variables

The  exercise appears under the 6th grade (U.S.) Math Mission. This exercise practices writing expressions with variables.

Types of Problems
There is one type of problem in this exercise:
 * 1. Write an expression to represent ___: This problem has two numbers, and one is a variable. The student is asked to type an expression that represents it (example: $$\frac{7}{b}$$)

Strategies
Knowledge of writing expressions and variables is essenatial to ensure success in this exercise.
 * 1. This exercise should be easier for speed badges because the numbers are relatively small and the expressions are easier to type.