# 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:**

4x^{2}+6

3x^{2}-5x+4

**What is the equation?**

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

For example

ax+b=c

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