# 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.

### Required Preparation

### CCSS Standards

Addressing

### 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)