# Lesson 5

Restemos con objetos

### Lesson Purpose

The purpose of this lesson is for students to represent the action of subtraction with objects.

### Lesson Narrative

In previous lessons, students represented addition by putting 2 groups of objects together or adding more objects. In this lesson, students represent the action of subtraction with objects. Students take away a number of objects and determine the number of objects remaining. The language of “quitar” // “take away” and restar” // subtract” is introduced by the teacher throughout the lesson. Students are not expected to produce this language in this lesson. The notation “_____ quitando _____?” // “_____ take away _____” is also introduced. Students need time to see and hear the teacher use this language before they can understand expressions “_____ - _____”, which are introduced in a later section.

• Representation
• MLR8

### Learning Goals

Teacher Facing

• Use objects to show the action of subtraction.

### Student Facing

• Usemos fichas para restar.

### Required Materials

Materials to Gather

Materials to Copy

• Number Mat 1–5

### Required Preparation

Activity 2:

• Each group of 2 needs 1 connecting cube.

Activity 3:

• Gather materials from:
• 5-Frames, Stages 1 and 2
• Roll and Add, Stage 1
• Math Libs, Stage 1
• Match Mine, Stage 1

### Lesson Timeline

 Warm-up 10 min Activity 1 10 min Activity 2 10 min Activity 3 25 min Lesson Synthesis 5 min Cool-down 0 min

### Teacher Reflection Questions

What evidence have students given that they understand the actions of addition and subtraction? What language do they use or associate with each operation?