# Lesson 25

Divide Decimals by Decimals

### Lesson Purpose

The purpose of this lesson is for students to divide decimals greater than 1 by decimals less than 1.

### Lesson Narrative

In previous lessons, students divided whole numbers by decimals and decimals by whole numbers, with the decimals always less than 1. The purpose of this lesson is for students to apply their understanding of the number of tenths and hundredths in 1 whole to divide a decimal greater than 1 by a decimal. Students use the same strategies that they have in previous lessons to find these quotients

- diagrams
- whole number facts combined with reasoning about place value
- using the relationship between multiplication and division

- Representation

- MLR7

### Learning Goals

Teacher Facing

- Divide decimals greater than 1 by decimals less than 1.

### Student Facing

- Let’s divide decimals by decimals.

### Required Materials

Materials to Copy

- Small Grids

### Required Preparation

### CCSS Standards

Addressing

### 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 unit, reflect on the norms and activities that have supported each student in learning math. List ways you have seen each student grow as a young mathematician throughout this work. List ways you have seen yourself grow as a teacher. What will you continue to do and what will you improve upon in the next unit?

### Suggested Centers

- Compare (1–5), Stage 6: Add and Subtract Fractions (Supporting)
- Would You Rather? (2–5), Stage 2: Compare to Smaller Units (Supporting)

### Print Formatted Materials

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Student Task Statements | docx | |

Lesson Cover Page | docx | |

Cool Down | Log In | |

Teacher Guide | Log In | |

Teacher Presentation Materials | docx | |

Blackline Masters | zip |