Aims:
- To understand and use rational numbers as quotients or part-whole relations

- To use mental and written calculation strategies

- To develop mathematical reasoning and communication

Materials:
- Worksheet, DIN A3 paper, pencils and rubbers.

Introduction:
•  Explanation of the work to be done in the classroom

•  Four groups composed by four pupils each

•  Delivery of the materials

•  Silent reading of the task to be carried out

•  The teacher clarifies any questions that may arise after the reading of the task.

Main part:
•  Pupils carry out the task

•  Each group presents on a large sheet (or transparency film) what they propose as a solution of the task

Roundup:
• Discussion of the results in the class;

• Contents systematization;

Observations
Pupils should solve the task autonomously but under the supervision of the teachers. Thus, students will be the builders of their own learning since they are responsible for the acquisition of knowledge.