Training. - method. allowance. M. : Karapuz, 2006. 14 s. (Arithmetic for preschoolers.) From 5 to 7) ISBN 5-8403-1201-0 . For adult children to read . The book is addressed to children 5-7 years old, who have already mastered elementary mathematical knowledge: they can count up to ten, freely use ordinal and quantitative numerals in speech, compare sets (numbers) within the first ten . Heroes of the Book - Mouse. Cards with their images you will find on the insert. They are useful not only for solving examples on the pages of "mouse arithmetic", but also as counting material for playing the lotto.