# Unit 1 Factors and Multiples (Family Materials)

In this unit, students learn about factors and multiples and apply their understanding of the area of rectangles. Students determine if a number between 1 and 100 is prime or composite.

Complete the statements for each number. Explain your reasoning.

number

factor

multiple

5

is a factor of because …

is a multiple of because …

18

is a factor of because …

is a multiple of because …

Questions that may be helpful as they work:

• How did you know this was a factor of that number?

• How did you know this was a multiple of that number?

• How are factors related to multiples?

• Is the number prime or composite? How do you know?

## Section A Understand Factors and Multiples

In this section, students learn about the meaning of factors and multiples by relating them to the concept of area. They use square tiles to build rectangles with given length and width. Then, they find the area of the rectangles.

For example, this rectangle has an area of 14 square units with side lengths of 7 and 2.