VA MIXED FRACTION PLUS MINUS

This is a program to learn the addition and subtraction of two mixed fractions and get the result in the form of a mixed fraction. Two approaches to solving the problem are shown: 1. separate addition and subtraction of integer parts and fractional parts, 2. representation of a mixed fraction as an improper fraction. Two methods of teaching are used: 1. program - teacher, 2. together with the program - teacher and student. All actions in the program occur without words, intuitively clear and understandable. In the process of solving problems and when entering data, hints are used to help.