A manual will help to form skills of account on the base themes of A-one : "Account within the limits of 5", "Account within the limits of 10", "Account within the limits of 20".How to understand, is skill of account led to automatism? On every sign of action 3-4 is taken p. If a child considers well, then example 8-2 3-4 3-6 2-1 - he will decide after 20-25 with, a quite good result will be and 30 p.To the manual the tasks of three levels to complication are driven: 1th level of complication - to calculate an answer| 2th level - to decide examples for a time, under columns time is indicated on the decision of all examples of this level : © is an excellent result, © - good, © - it is needed to be trained yet| 3th level - to insert the number skipped in an example.A decision of chainlets of examples is the effective training allowing to take calculable skills of child to automatism. The automated skill of account will help to economize precious time at the decision of tasks, long examples, inequalities and equalizations. In addition, the automated account memory, logical thinking, flexibility of mind and quick wits, will develop for a child, and also considerably will promote the capacity of brain - activates development of speech and intellect, ability to retain and commute attention.A manual will be useful to work in a class and independent studying at a home.