This document contains a series of math problems and their solutions. It begins with the title "Le code des opérations" and contains 5 math problems with the corresponding solutions shown. The problems include addition, subtraction, multiplication and order of operations. The document provides the work and answers to calculating 27 + 94 + 73, 20 - 13 + 3, 2.5 x 3.7 x 4, 30 + 7 x 4, and 6 x 7 - 5 x 4.