VA LINE FRACTION

This is a program for studying the solution of an arithmetic expression written in a line, which consists of multiplication and division of four integers with division, multiplication signs, as well as parentheses and obtaining the result in the form of a mixed fraction. Such an expression can be written in seven equivalent variants. There are three ways of teaching: 1. independently - the student, 2. the program - the teacher, 3. together with the program - the teacher and the student. All actions in the program occur without words, intuitively clear and understandable. In the process of solving problems and entering data, hints are used to help.