Mathematics. 1st Grade. Developing Counting Skills from 0 to 20

This textbook will contribute to the effective study of mathematics in the 1st grade. In a simple and accessible form, it will allow the child to develop, reinforce, and test key skills on the most important topics of the subject... being studied.Carefully selected examples and tasks will help not only to master the simplest arithmetic operations of addition and subtraction within 20, but also to learn how to correctly format mathematical examples and problems.All tasks are clearly formulated and systematized within one page. The child can independently assess the work done on each page - encircle a sun symbol in the margins with the corresponding grade.