The manual contains about 4000 named mathematical examples on topics studied in the second quarter of grade 5. The original construction of the material allows for a deeper assimilation.As practice shows, the student has fully mastered the program if he solves an example and writes down the answer after 4-7 seconds. When there are many conversions to smaller units in a column (for example, to get a more accurate answer, hours and minutes must be converted to seconds), the solution time for one example increases to 12 seconds. In this case, we can say that the counting skill has been brought to automatism.On each page there are 3-5 columns with an average of 50 examples. If the student solves the column in 4-6 minutes, this indicates a good level of preparation. It should take no more than 30 minutes for a whole page. To achieve excellent results, one page should be solved every day.The manual can be used in mathematics lessons, as well as for independent work at home.