The set of the fractions formed with integral numbers, along with the operations of the addition and the multiplication, body of the racional numbers forms a called body. Many of the properties characteristic of the racional numbers are also fulfilled for other bodies, even if the elements and the operations for these other bodies are completely different. Natural phenomena: the Natural phenomena are manifestations of the transformation that happens to him to the matter. I consider that it is a good definition, it cuts and it needs. The Teacher: the educational one will be able to develop to sum and subtractions. And to cause that the children observe as the addition or subtraction of a number affects result.
Then the same numbers for a sum and a subtraction can be used. And they would observe that to when they are the same numbers, the transformation is evident. Example: 56 56 + 43 – 43 – 99 13 The Teacher: The educational one will cause that the children make sum and subtractions with the same numbers and that soon they analyze the results and they express that they think than it happens with the result. That if were currencies that their Popes went to them to give, what operation would choose. As the majority would incline by more that is to say, addition. We change the question.
If they had to make the number of tasks that appear in the operations Which would choose? Evidently they will choose the subtraction. This can be a very pedagogical game. Here it is possible again on approval to be placed the pedagogical tools of the teacher. The teacher to others would show to them that their thoughts also become or change.