| A | B |
|---|
| number expression | a number or numbers written together with operations |
| parentheses | a pair of grouping symbols; may also mean multiplication |
| simplify | carry out the operations; find the value |
| equivalent | having the same value; equal |
| number equations | a statement that two number expressions are equal |
| property | a fact that is true for addition or multiplication |
| Commutative Property | two numbers can be added in any order; two numbers can be multiplied in any order |
| Associative property | more than two numbers can be added or multiplied in groups of two; the way the numbers are grouped doesn't matter |
| Identity Property | adding 0 to a number does not change the number |
| Zero property | a number multiplied by 0 is 0 |
| Distributive property | to multiply the sum or difference by a number; multiply each number of the sum or the difference |
| Division properties | a number divided by itself is 1; a number divided by 1 is the same number; 0 divided by any number that is not 0 is 0 |
| area | the number of squares needed to cover a closed figure |
