| A | B |
|---|
| whole number | one of the numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, etc. |
| commutative property (order) | two numbers can be added or multiplied in any order and the answer will be the same (4+3=3+4 or 2x5=5x2) |
| associative property (grouping) | grouping of numbers in addition or multiplication can be changed and the answer will be the same (3+5)+7=3+(5+7) |
| inverse operations | opposite operation (addition/subtraction; multiplication/division) |
| factor | a number that is multiplied (in 6x7=42; 6 and 7 are factors) |
| place value | value of each digit in a number, based on the location of the digit |
| equation | a number sentence that uses an = sign to show that amounts are equal |
| rule | a standard method for solving math problems |
| variable | a symbol or a letter that stands for an unknown number (5+n=9) |
| number sentence | a sentence that includes numbers, operation symbols, and greater than, less than or equal signs (5+8=13) |
| pattern | a model or plan by which objects or numbers can be arranged so that what comes next can be predicted (3,5,7,9,...) |
| expression | the part of a number sentence that combines numbers and operation signs, but doesn't have an equal sign. (8+9) |
