pre-algebra vocab. chpt 1
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Created by:
Lorraine2627 on November 10, 2011
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20 terms
Terms | Definitions |
|---|---|
 algebraic expression | The expression 2 x n is called an algebraic expression because it contains a variable, a number, and at least one operation. |
| equation | mathematical sentence containing two expressions separated by an equals sign (=) |
| define a variable | by assigning a variable to represent the unknown quantity |
| conjecture | make an educated guess |
| algebra | The branch of mathematics that involves expressions with variables |
| evaluate | find the value of an algebraic expression |
| order of operations | find the value of the expression |
| counterexample | an example that shows that a conjecture is false |
| numerical expression | one with only numbers and operations |
| integer | is any number from the set |
| coordinate | the number that corresponds to a point |
| inequality | a mathematical sentence indicating that two quantities are not equal; inequalities contain symbols like < and > |
| absolute value | the distance between a number and 0 on a number line |
| opposites | two numbers with the same absolute value but different signs |
| additive inverses | an integer and its opposite |
| solve | you are finding the values of the variable that make the equation true |
| solutions | values solved |
| inverse operations | "undo" each other |
| powers | represent repeated multiplication (7 7 squared or 7 x 7 |
| variable | symbol, usually a letter, used to represent a number |
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