Variables and Expressions

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number in mathematical expressions or equations.

Front

What does it mean to increase a number by a certain value?

Back

To increase a number by a certain value means to add that value to the number.

Front

What does it mean to decrease a number by a certain value?

Back

To decrease a number by a certain value means to subtract that value from the number.

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operations (like addition or multiplication) that represents a value.

Front

How do you evaluate an expression?

Back

To evaluate an expression, substitute the values of the variables into the expression and perform the operations.

Front

What is the product of two numbers?

Back

The product of two numbers is the result of multiplying them together.

Front

What is the sum of two numbers?

Back

The sum of two numbers is the result of adding them together.

Front

What is the difference between two numbers?

Back

The difference between two numbers is the result of subtracting one number from the other.

Front

What does the expression 3(b+c) represent?

Back

It represents three times the sum of b and c.

Front

Evaluate: 3(b+c) when b=10 and c=5.

Back

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