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Roots and Exponents
Essential Vocabulary for Unit 2
| Term | Definition |
|---|---|
| Variable | a symbol (usually a letter) used to represent an unknown number |
| Base (of a power) | the (big) number used in repeated multiplication/division |
| Exponent | the (small) number that tells us how many times to use the base in multiplication/division |
| Square of a Number | when you multiply that number by itself |
| Square Root of a Number | a number that, when used in multiplication two times, gives that number |
| Cube of a number | when you multiply that number by itself three times |
| Cube Root of a Number | a number that, when used in multiplication three times, gives that number |
| ± | tells you one value is positive and one value is negative (example: ±3 = 3 and -3 |
| Simplify | to do all possible operations (Parenthesis, Exponents, Multiply and Divide, Add and Subtract) |
| Expression | a mathematical phrase that can contain numbers, variables, and operations |
| Power | refers to the exponent; (also) refers to a base number and its exponent |
| Exponential Numbers | numbers that contain exponents |
| Scientific Notation | a way to write very small or very large numbers |
| Rational Numbers | numbers that can be written as a fraction |
| Irrational Numbers | numbers that cannot be written as fractions |