Specific features of the application of arithmetic problems for mental calculation in the manuals 
of teachers S.A. Rachinsky and A.F. Malinin

The article considers the possibilities of using of pedagogical ideas for the formation of mental calculation skills based on the well-known manuals of methodologists of the late part of 19th century S.A.Rachinsky and A.F.Malinin. The works published by the authors are not only a methodological guideline, but also an inexhaustible storehouse of practical tasks for modern schools.