1. Variable - a letter or symbol used to represent an unknown number in a math problem.

2. Equation - a math sentence that shows two expressions are equal.

3. Expression - a combination of numbers, letters, and math operations.

4. Coefficient - the number multiplied by a letter in a term.

5. Term - a part of an expression separated by plus or minus signs.

6. Constant - a number that stays the same in an equation or expression.

7. Simplify - to make a math problem easier by combining like terms or performing operations.

8. Solve - to find the value(s) of a variable that make an equation true.

9. Inequality - a math sentence that shows a relationship between two expressions using symbols like <, >, â‰¤, or â‰¥.

10. Factor - to break down an expression or number into smaller parts.

11. Distributive Property - a rule that lets you multiply a number by each term inside parentheses.

12. Exponent - a small number that shows how many times a base number is multiplied by itself.

13. Linear Equation - an equation that represents a straight line on a graph.

14. Quadratic Equation - an equation that can be written in the form ax^2 + bx + c = 0, where a, b, and c are numbers.

15. System of Equations - a group of equations with the same variables that are solved together.

16. Function - a relationship between two sets of numbers, where each input has only one output.

17. Domain - the set of possible input values for a function.

18. Range - the set of possible output values for a function.

19. Absolute Value - the distance of a number from zero on a number line.

20. Inverse Operations - operations that undo each other, like addition and subtraction, or multiplication and division.