# Lesson 7

Find Factors and Multiples

### Lesson Purpose

The purpose of this lesson is for students to find factors and multiples of a given whole number from 1–100.

### 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.

• Engagement
• MLR8

### Learning Goals

Teacher Facing

• Determine whether a number from 1–100 is a multiple of another number.
• Find all factor pairs of a given whole number from 1–100.

### Student Facing

• Let’s find factors and multiples of whole numbers from 1–100.

### Required Materials

Materials to Gather

Materials to Copy

• Find the Number Stage 2 Directions and Gameboard

Building On

### Lesson Timeline

 Warm-up 10 min Activity 1 15 min Activity 2 20 min Lesson Synthesis 10 min Cool-down 5 min

### 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?

### Suggested Centers

• Five in a Row: Multiplication (3–5), Stage 2: Factors 1–9 (Addressing)
• Secret Fraction (3), Stage 1: Building Non-Unit Fractions (Supporting)