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The manual is designed for students to master the programme material on new topics independently - both offline in class and online at home. Using the QR code, students will be able to take a test on each new topic using any gadget. The teacher will be able to upload the test tasks to any distance learning platform to organise the assessment of the whole class. In the context of distance learning, this manual will help to effectively organise the child's work at home and will become an indispensable tool for teachers and parents. It meets the requirements of the Model Educational Programmes in Mathematics for 3rd grade students.