ABSTRACT
This chapter is about mathematical indigenous knowledge of Brazilian rural workers of the “Movimento dos Trabalhadores Rurais Sem-Terra”, in English, Landless People Movement. It is a national organization of peasants who strive to achieve land reform and social changes in a country with very deep social inequalities. What I wish to stress here is what distinguishes Brazil, is not that it is a poor country, but that it has one of the highest rates of social inequalities in the world. One example of this situation can be seen in the following official data: in 1995 the wealthiest 10% of the Brazilian population had an income 44 times higher than the poorest 10%, whose average monthly income, in that year, was 48 dollars.
