| A | B |
| period | a group of three places in a number separated by a comma |
| expanded form | a number written in a form that shows the value of each digit |
| sum | the answer to an addition problem |
| difference | the answer to a subtraction problem |
| product | the answer to a multiplication problem |
| quotient | the answer to a division problem |
| place value | the value of a digit depending on its place in a number |
| commutative property | a property stating the ORDER of the numbers being added or multiplied does not change the answer |
| 4+6 = 6+4 | example commutative property of addition |
| 5x2 = 2x5 | example of commutative property of multiplication |
| digit | a symbol used to show a number |