***** Arithmetic addition, subtraction, counting numbers 1-20 for kids (Math kids) ***** Preschool or kindergarten children are a period of development in many important areas that are the basis for success in life in the future. if learned correctly will make the child have a good development Therefore, we strive to develop and design programs for addition, subtraction, arithmetic and counting from 1-20 to enable children to learn and develop their mathematical concepts. correctly We have added