Методика начальной арифметики

Bok av &1050.&1055. ?????????
Kniga nachala 20 veka po metodike prepodavaniya arifmetiki v nachalnoj shkole. 21-e izdanie. This book, "Metodika nachalnoj arifmetiki", by K.P. Arzhenikov, is a replication of a book originally published before 1916. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible.