Organization of Clubs Related to Mathematics for Elementary Grades

This article presents methods for organizing extracurricular activities in mathematics in elementary grades, which is one of the pressing problems of primary education. The patterns of increasing and decreasing numbers are shown, and cryptic instructions are given for each digit, accompanied by lines of poetry, which contributes to their better memorization. Information is provided on the signs of divisibility of numbers. Examples performed using the division action are checked by the inverse action - multiplication, which is an important aspect for primary school students.