Matemática na ida ao supermercado: a importância da matemática na economia doméstica

Abstract

The research carried out seeks to emphasize the usefulness of basic Mathematics when going to the supermarket, whether physical store or e-commerce. First, the Arithmetic of the configuration of fruits or food products that can be stored in pyramid-shaped piles with a triangular base and the presence of bar codes on the products was seen. In the practical examples, it was verified which packaging offered the Best financial advantage, observing the price, the weight compared to the others available. Then, making use of basic Mathematics, in addition to evaluating the measurements, the size of the packages, the prices and the weight, the percentages in the promotions and the notion of a set in the organization of the shelves in the supermarkets were analyzed. Hence, the importance of comparing products ranging from preference for a brand to analyzing the price before buying them. In the supermarket and financial education relationship, the importance of good management of domestic finances was highlighted, with emphasis on the forms of payment in cash and on installments and the means used to make purchases, whe ther in supermarkets (physical store or virtual store). Pedagogical projects involving the fictitious supermarket that were carried out within the school and a specific virtual supermarket project with the use of software were described. In both, the use of basic mathematics was highlighted,suchas proportionality, percentage, conversion of measures and operations, inaddition to working on the issue of Money when buying, discouting and changing change. These experiments were carried out with the purpose of providing students with a fun way to become familiar with Mathematics and reflect on situations related to buying, selling and valuing the conscious use of money.