# 4.1 Factors and Multiples

## Unit Goals

- Students apply understanding of multiplication and area to work with factors and multiples.

### Section A Goals

- Determine if a number is prime or composite.
- Explain what it means to be a factor or a multiple of a whole number.
- Relate the side lengths and area of a rectangle to factors and multiples.

### Section B Goals

- Apply multiplication fluency within 100 and the relationship between multiplication and division to find factor pairs and multiples.

### Glossary Entries

**composite number**A whole number with more than 1 factor pair.**factor pair of a whole number**A pair of whole numbers that multiply to result in that number. For example, 5 and 4 are a factor pair of 20.**multiple of a number**The result of multiplying that number by a whole number. For example, 18 is a multiple of 3, because it is a result of multiplying 3 by 6.**prime number**A whole number that is greater than 1 and has exactly one factor pair: the number itself and 1.