Variables

Front

What is a variable in mathematics?

Back

A variable is a letter or symbol that represents a number or value in mathematical expressions and equations.

Front

What is the sum of r, y, and t if r=2, y=4, and t=1?

Back

The sum is 7.

Front

If g=4 and f=5, what is the value of f-g?

Back

The value of f-g is 1.

Front

If d=3, what is the value of d multiplied by 10?

Back

The value is 30.

Front

If f=5, k=3, and f+k+l=10, what is the value of l?

Back

The value of l is 2.

Front

What is the purpose of using variables in equations?

Back

Variables allow us to represent unknown values and solve for them in mathematical problems.

Front

How do you solve for a variable in an equation?

Back

To solve for a variable, isolate it on one side of the equation using inverse operations.

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, *, /) that represents a value.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with their corresponding numbers.

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression does not include an equality sign.