Mathematical Domino "Part of a Whole"

A mathematical domino "Part of a Whole" and computer models of domino tile tasks related to a part of a whole are presented. To create them, fractions, decimal fractions and percentages were used as different ways of writing a part of a whole. Compositions colored in two colors are also included, including parquet tiles in the style of Maurits Escher. The computer models are made with GeoGebra software. The presented computer models are provided with free access in the Virtual Mathematics Laboratory, developed at the Institute of Mathematics and Informatics of the Bulgarian Academy of Sciences. An expert assessment of teachers of Information technology, Mathematics, Engineering and Art, for the computer models is presented. The presented computer models and dominoes are suitable for use in classes of Mathematics, Information Technology, Computer Modeling, Arts, STEM centers. It is appropriate to organize domino tournaments, as well as team competition, to continue by analogy the idea of forming competence in percentages, as well as understanding the relationship between a fraction, a decimal fraction and a percentage.