# Lesson 9

Mismo dígito, distinto valor

### Lesson Purpose

### Lesson Narrative

This lesson shifts the focus from reading and writing numbers to describing the multiplicative relationship between place values in a multi-digit number. In previous lessons, students used base-ten blocks to represent large numbers, and wrote numbers in expanded form. In this lesson, they use their developing understanding of the value of a digit to begin to articulate that a digit in one place is ten times the value as the same digit in a place to its right.

The syntheses in this lesson help students connect the language of “ten times the value” to equations to help them represent this concept.

- Representation

- MLR2

### Learning Goals

Teacher Facing

- Describe that the value of a digit in one place represents ten times what it represents in the place to its right.

### Student Facing

- Describamos la relación que hay entre los dígitos de un número de varios dígitos.

### Required Materials

Materials to Copy

- Card Sort: Large Numbers (4 to 6 digits)

### Required Preparation

Activity 1:

- Create a set of cards from the blackline master for each group of 2 students.

### Lesson Timeline

Warm-up | 10 min |

Activity 1 | 20 min |

Activity 2 | 15 min |

Lesson Synthesis | 10 min |

Cool-down | 5 min |

### Suggested Centers

- Greatest of Them All (1–5), Stage 3: Multi-digit Numbers (Addressing)
- Mystery Number (1–4), Stage 4: Fractions with Denominators 5, 8, 10, 12, 100 (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 |