# Lesson 10

Multiplication and Division

### Lesson Purpose

### Lesson Narrative

In previous units, students learned the meaning of multiplication and division and understood division as an unknown-factor problem. They have worked to develop fluency with multiplication within 100. In this lesson, they continue that work by reinforcing their understanding of the relationship between multiplication and division.

In the first activity, students are given a card with an equation or a diagram and asked to find another student whose card represents the same situation or quantities. Then, they create an additional diagram and a situation that matches their division equation. Students then view and compare the diagrams and the situations that their classmates created in a gallery walk.

If students need additional support with the concepts in this lesson, refer back to Unit 4, Section B in the curriculum materials.

- Engagement

- MLR7

Activity 1: Card Sort: Find the Match

### Learning Goals

Teacher Facing

- Interpret representations of the relationship between multiplication and division.
- Represent the relationship between multiplication and division.

### Student Facing

- Let’s represent equal groups and write equal groups situations.

### Required Materials

Materials to Gather

Materials to Copy

- Find the Match

### Required Preparation

Activity 1:

- The blackline master has 24 cards. Copy and cut enough cards so that each student can have one card.

Activity 2:

- Keep posters from the previous activity displayed.

### Lesson Timeline

Warm-up | 10 min |

Activity 1 | 25 min |

Activity 2 | 10 min |

Lesson Synthesis | 10 min |

Cool-down | 5 min |

### Teacher Reflection Questions

### Print Formatted Materials

Teachers with a valid work email address can click here to register or sign in for free access to Cool Down, Teacher Guide, and PowerPoint materials.

Student Task Statements | docx | |

Lesson Cover Page | docx | |

Cool Down | Log In | |

Teacher Guide | Log In | |

Teacher Presentation Materials | docx | |

Blackline Masters | zip |