# Lesson 5

Subtract with Objects

### Lesson Purpose

### 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 “take away” and “**subtract**” is introduced by the teacher throughout the lesson. Students are not expected to produce this language in this lesson. The notation “_____ 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

- Let’s use counters to subtract.

### 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 |