Mathematics and computer science. Grade 3. Task. Part 4

The course "Mathematics and Informatics" is designed to study for four years in the amount of four or five lessons per week. Various work options are provided - both using ICT and without them.
The set for the third grade includes a textbook in six parts and a problematic in six parts.
For the convenience of the teacher, the tasks are conventionally divided into lessons, and lessons - into weeks. The last two tasks in the lesson are usually quite difficult and optional. Depending on the individual characteristics of the children, the teacher can change the speed and order of the material, distribute the material between the classroom work and homework, and endure part of the tasks for additional classes, independent, control and verification work.
The computer component and methodological recommendations are posted on the Nachalka.seminfo website.
2nd edition, modified