The training book "Mental Arithmetic", from 5 years, 44 p.

Mental arithmetic is a technique for the development of intelligence, based on the use of special accounts-Abakus, with whom the child will learn to quickly count in his mind.

with the book “Letter-Lend” you can prepare a child for entering school and give the basic account skills.

• Rules for using Abakus,
• “Formula of the younger comrades”,
• test tasks.

• soft binding.
• The size of the book: 17 × 24 cm.
• In the book 44 pages.
• Recommended for children from 5 years old.
• Abakus does not enter the kit.

completing tasks from the book, the child will learn how to quickly count, train the petty Motoric, attention and memory.