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Math Topic #2
Variables, Expressions, and Properties
Term | Definition |
---|---|
Input/Output Table | A table of related values. |
Variable | A quantity that can change or vary, often represented with a letter. |
Associative Property of Addition | The way numbers are grouped does not affect the sum. |
Commutative Property of Addition | The order in which numbers are added does not change the sum of the numbers. |
Algebraic Expression | A mathematical phrase that has at least one variable and one operation. |
Coefficient | The number that is multiplied by a variable in an algebraic expression. Example: For 6x + 5, the coefficient is 6. |
Commutative Property of Multiplication | The order in which numbers are multiplied does not change the product of the numbers. |
Associative Property of Multiplication | The way numbers are grouped does not affect the product. |
Identity Property of Addition | Adding zero to a number does not change the number. |
Substitution | To replace a variable with a number. |
Evaluate | To find the value of an expression. |
Order of Operations | A set of rules mathematicians use to determine the order in which operations are performed. |
Identity Property of Multiplication | The product of a number and one is that number. |
Distributive Property | Multiplying a sum (or difference) by a number gives the same result as multiplying each number in the sum (or difference) by the number and adding (or subtracting) the products. |