^^Numeri razionali.

 

The Development of Multiplicative Reasoning in the Learning of Mathematics (Google eBook) 1994

Rational Number Project

Rational numbers are not simply ordered pairs of whole numbers

pag viii

 

6 costruzioni dei nr razionali

  1. part to whole comparison
  2. decimal
  3. ratio
  4. indicated division (quotient)
  5. operator
  6. measure of continuos or discrete quantities

 

Misconception: multiplication makes bigger and division makes smaller.