# Lesson 15

Multiply More Fractions

### Lesson Purpose

The purpose of this lesson is for students to apply their understanding of the properties of operations to multiply whole numbers and fractions greater than 1 written as mixed numbers.

### Lesson Narrative

In previous lessons, students used the properties of operations to write equivalent expressions in order to find products of fractions greater than 1 written as mixed numbers.
In this lesson, students apply their understanding of the properties of operations to multiply whole numbers and fractions greater than 1 written as mixed numbers. In each activity, encourage students to think flexibly, using everything they have learned about fraction decomposition, multiplication, and the properties of operations.

• Engagement
• MLR7

### Learning Goals

Teacher Facing

• Multiply whole numbers and fractions using the properties of operations.

### Student Facing

• Let’s multiply mixed numbers.

### Lesson Timeline

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

### Teacher Reflection Questions

Who has been sharing their ideas in class lately? Make a note of students whose ideas have not been featured in class and look for an opportunity for them to share their thinking in tomorrow’s lesson.

### Suggested Centers

• Rectangle Rumble (3–5), Stage 4: Whole Number and Fraction Factors (Addressing)
• Can You Build It? (3–5), Stage 2: Multiple Rectangles (Supporting)