What Does Expression Mean in Math?

An expression is a sentence with two or more variables or numbers and a math operation .math operation can be addition, multiplication, subtraction, and division.

What is expression math?

An expression is a sentence with two or more variables and a number of math operations can be addition, multiplication, division, or subtraction.

Structure of an expression.

Expression is a variable and number

Math operator is a variable and number

Example of expression:

Example 1	5+9
Example 2	22.6X4
Example 3	2x-5s
Example 4	3a4+7-4÷15

Nonexamples of expressions:

Example 1	a
Example2	5
Example3	6.87

All given expressions used by math operators between two numbers

Parts of expression

Constant: is a does not change the numerical value

Variable: a letter that takes the of an unknown.

OR   is a do not a fixed value

Coefficient: is multiplied by a variable

For example:

2x+3

3=constant

X=variable

2=coefficient

Terms Number or variables separated by math operator addition, subtraction, multiplication, divisions

Example:

 6a+3b-8 àthree term

Terms are 6a, 3b, and 8

What is math operator?

Math operator can be addition, subtraction, multiplication, division. Subtraction is a reciprocal of addition .division is a reciprocal of multiplication

Addition (+)

Multiplication (×)

Subtraction (-)

Division (÷)

Types of expression

• Numerical expression
• Algebraic expression
• Equation

What is a numerical expression?

A numerical expression is a mathematical statement that includes only numbers and one or more math operation symbols.do not contain signs of equality and sign of inequality. A Sum of three and seven (3+7) is called a numerical expression

For example:

 54+6

45÷9×4-9+7

What is Algebraic Expression?

An algebraic expression is a mathematical statement the expression contain an unknown variable, numbers and one or more math operation do not contain the sign of equality (=).

And the sign of inequality (≠)

For example:

4x²+6

3x²-5x+4

What is the equation?

An algebraic expression that contains the sign of equality (=) is called an equation.

For example

ax+b=c

3x+7=12