# Lesson 7

Números con decenas y unidades

### Lesson Purpose

The purpose of this lesson is for students to understand that two-digit numbers are composed of tens and ones.

### Lesson Narrative

In the previous lesson, students considered different ways to organize, count, and represent a collection of 52 objects.

In this lesson, students generalize the base-ten structure to all two-digit numbers. They read these numbers and consider how they are made up of tens and ones. At this time, students do not need to write two-digit numbers because they will do so in a later lesson.

- Action and Expression

- MLR8

### Learning Goals

Teacher Facing

- Read two-digit numbers.
- Understand any two-digit number as composed of tens and ones.

### Student Facing

- Aprendamos más sobre decenas y unidades.

### Required Materials

Materials to Gather

Materials to Copy

- Make It, Two-Digit Numbers Recording Sheet Number, Drawing, Words, Spanish

### Required Preparation

- Create a poster with the number 6 in the tens place and a sticky note to the right of the 6 for the Lesson Synthesis.

Activity 3:

- Gather materials from previous centers:
- Shake and Spill, Stages 3–5
- How Close, Stages 1 and 2
- Check It Off, Stages 1–3

### Lesson Timeline

Warm-up | 10 min |

Activity 1 | 15 min |

Activity 2 | 10 min |

Activity 3 | 15 min |

Lesson Synthesis | 10 min |

Cool-down | 0 min |

### Teacher Reflection Questions

What opportunities are you giving students to reflect on their understanding of the mathematical content?