Unit 1, Lesson 7
Find Factors and Multiples
Grade 4
Preparation
Lesson Narrative
In previous lessons, students learned about factor pairs, multiples, and prime and composite numbers.
The purpose of this lesson is for students to use the language of factors and multiples to describe numbers within 100. Students look for all factors of numbers and decide whether a given number is prime or composite. Students are encouraged to find patterns in composite numbers which help to identify a factor. For example, if the last digit of a number is 0 then 2, 5, and 10 are all factors of that number.
Math Community
Tell students they will reflect on their identified norms at the end of this lesson.
This lesson has a Student Section Summary.
- Engagement
- MLR8
- Justify (orally and in writing) that a number is a factor of another number.
- Justify (orally and in writing) that a number is a multiple of another number.
- Let’s find factors and multiples of whole numbers from 1 to 100.
Required Preparation
- Each group of 2 needs 100 centimeter cubes.
Teacher Reflection Questions
As you finish up this section, reflect on the norms and activities that have supported each student in learning math. How have you seen each student grow as a young mathematician throughout this work? How have you seen yourself grow as a teacher?