The first section of this collection offers tasks to deepen and consolidate computing skills in the range of 10, 20 and 100. Exercises for oral arithmetic, as well as tasks, expressions and creative tasks meet the requirements of new standard educational programs and the State Standard of Primary Education . The second section presents interesting tasks for the development of cognitive activity and logical thinking of students, tasks of increased complexity, tasks with tangram. The collection also contains test tasks to check the level of students' mastery of the program material in mathematics in the 1st grade (third section). Interesting is the color tab, which offers abacus, box "Number Composition", counting material, fan, tangram, which can be made yourself. The collection will help the teacher in the selection of material for lessons and additional classes, will be useful for independent work of students and testing their knowledge by parents.