# Lesson 11

Equations that Show 10

### Lesson Purpose

The purpose of this lesson is for students to connect equations with compositions and decompositions of 10 on 10-frames and fingers.

### Lesson Narrative

In previous lessons, students saw equations as one way to represent the answer to a story problem. In this lesson, students make sense of equations in relation to 10-frames and fingers. Students work with many different compositions and decompositions of 10, which will be useful in future lessons when students find the number that makes 10 when added to a given number.

When students match different representations of addition (equations, 10-frames, and fingers) they reason abstractly and quantitatively (MP2).

- Representation

- MLR8

### Learning Goals

Teacher Facing

- Match equations to compositions and decompositions of 10

### Student Facing

- Let’s match equations to 10-frames and fingers.

### Required Materials

Materials to Gather

### Required Preparation

Activity 2:

- Each student needs at least 2 different colored crayons.

Activity 3:

- Gather materials from:
- Shake and Spill, Stages 1–3
- Counting Collections, Stage 1
- Roll and Add, Stages 1 and 2

### 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 makes someone good at math? In what ways are you making assumptions about which of your students are good at math?