Expressions

An expression is a combination of numbers, symbols, and operators (such as +, -, *, /) that represents a value. It can also include variables, which are placeholders for unknown values. Expressions can be simple or complex, and they can be used to perform calculations or evaluate a value.

Types of Expressions

There are different types of expressions, including:

• Numerical expressions: These contain only numbers and operators, such as 5 + 3 * 2.
• Variable expressions: These include variables, such as x + 7 or 3y - 4.
• Algebraic expressions: These involve variables and can include terms, coefficients, and exponents, such as 2x^2 + 3x - 5.

Example

Let's consider the expression 4x + 2y. This is a variable expression that involves the variables x and y, and the operation of addition. If x = 3 and y = 5, then the value of the expression would be 4*3 + 2*5 = 12 + 10 = 22.

[Expressions] Related Worksheets and Study Guides:

• AlgebraMathematics • Fourth Grade
• Order of OperationsMathematics • Sixth Grade