It presents an application of the pedagogical intervention project, “Congruence in El-
ementary School ”in an 8th grade class at Professor José Municipal School Pereira da
Silva, in Campos Belos - GO. Methodologically, we approach the research research and
action research, mainly aiming to use the Arithmetic of the remains (Congruence) as a
facilitating tool for the development of logical reasoning or mathematical literacy. As a
reference, in a diagnostic activity composed of ten questions of elementary mathematical
“operations” we find a very students on the mathematical foundation. We found that
almost 50according to official documents, they are in the curriculum until the 6th grade,
besides to be essential for socializing in society. We can see that arithmetic of the remains
aroused the interest of the students about the content through the use of “Tricks” and
“guesswork” and more, the problems of the arithmetic of the remains from the Evidence
and the OBMEP in-room question bank aroused “thinking” of the students. Therefore,
we notice an advance on the logical reasoning of the students of the 8th year they partic-
ipated in the project. Like, it’s about active learning, that is, leading students to think,
to produce, we lead them to mathematical literacy, BNCC requirements.
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