A set of double-sided cards (5 pcs.) on plastic with tasks for solving logical problems and examples within 20 with a passage through 10 (definition and comparison of quantities, addition, subtraction, composition of numbers) with self-checking. Each side of the card contains at least 8 examples, a panel of correct answers with their colour designation, a contoured black-and-white template for placing answer cubes of the required colour, a template in the form of a sequence of coloured squares indicating answers to the tasks on the back side of the card. Designed to visualise the process and development of oral counting skills, expanding elementary mathematical concepts, developing logical thinking.
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