| Term | Definition |
| Place Value | Where a digit is located within a number |
| Standard Form | Writing a number using only digits |
| Word Form | Writing a number using English (Words) |
| Expanded Form | Writing a number using the value of each digit |
| Digit | A number 0 through 9 |
| Value | How much a number is worth |
| Whole Number | A number that does not contain a decimal point |
| Least | The smallest number in a group of numbers |
| Greatest | The largest number in a group of numbers |
| Sum | Answer to an addition problem |
| Difference | Answer to a subtraction problem |
| Rounding | Replacing a number with another number that tells about how many or how much |
| Estimate | To find a number that is close to an exact amount |