Definition Of Expression In Math With Example

In these lessons we will learn what variables constants terms expressions and coefficients are in algebra.

Definition of expression in math with example.

In mathematics an expression or mathematical expression is a finite combination of symbols that is well formed according to rules that depend on the context. This math operation can be addition subtraction multiplication and division. Scroll down the page for more examples. An expression is a mathematical phrase that combines numbers and or variables using mathematical operations.

For example variables and or numerals that appear alone or in combination with operators are expressions. A variable expression or an algebraic expression is a combination of terms by the operations such as addition subtraction multiplication division etc. An algebraic expression consisting of two or more like terms can be simplified by combining like terms. Like terms are terms that have the same variable part i e.

For example the formula for the area of a circle a π r2 gives the dependent variable a the area as a function of the independent variable r the radius. Many widely used mathematical formulas are expressions of known functions. An expression is a representation of a value. Definition of expression in mathematics the expression is defined as a phrase that groups together numbers constant letters variables or their combination joined by operators to represent the value of something.

Numbers symbols and operators such as and times grouped together that show the value of something. The following diagram shows some examples of like terms. Example of a variable expression an example of a variable expression or an algebraic expression is 5x 7 5 x 7 evaluating a variable expression. Expression number math operator number.

An example of a mathematical expression with a variable is 2 x 3. An expression can be arithmetic algebraic polynomial and analytical. They only differ in their coefficients. In algebra we begin to see variables or letters that are used to represent numbers.

An expression is a sentence with a minimum of two numbers and at least one math operation. All variables must have a coefficient a. Algebraic terms expressions in mathematics often the value of a certain number may be unknown.