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The proposed mathematical simulator corresponds to the State Standard of Primary Education, typical educational programmes and current textbooks . In each lesson, students solve the expressions for 3 minutes. The teacher records the time and evaluates the correctness of the tasks, because speed (along with correctness) characterises the level of mastery of students' computational skills.

The one who performed the calculations faster solves the problem and colours the picture.

This guide can also be used for work at home.