30000 examples in mathematics. Grade 3

The main task of the simulator is the development of the third -grader of the ability to count quickly and without errors. To bring the account skills to automatism and their relief consolidation, he is proposed to solve speed examples. The degree of assimilation of the material is estimated by the time spent on the decision, and the number of errors. All tasks are grouped into standard blocks. In each of them, the student needs to perform a short, middle and long series of examples built into columns of various lengths. By analogy with sports, they are named "sprint", "middle distance" and "marathon". Before starting the solution of each column, you need to detect time, and at the end, write down how much time has passed. After that, the answers are checked. If errors were made, their number is also recorded. Gradually, as the time spent decreased, the number of errors will strive for zero.

The manual is intended for classes both at home and at school as additional material.