Mental arithmetic. Part 2. Simple account (set)

A simple account is the second part of a series of manuals on mental arithmetic. It consists of two books. The first book is a simple account within ten. The second book is a simple account of two -digit. The whole series includes: "quantitative account", "simple score", "composition of the number", "helping a brother, helping a friend", "combined account", "account at the mental level", "multiplication table".
The book is useful for teachers of preschool education, parents and children not related to mental arithmetic. Classes are built in such a way that children easily remember numbers, their spatial position and shape, they form the concept of number. All these are the necessary conditions for the formation of the account.
The book will be appreciated by practitioners working in mental arithmetic and soroban programs. It can serve as the main manual and a wonderful addition to the existing materials.
The program is built step by step and aims to form the number of numbers and teach children visualization. The use of the manual greatly facilitates the accounting of the account at the mental level.
Colored stickers are attached to the book