Найди площадь прямоугольника, изображённого на клетчатой бумаге с размером клетки 1 см × 1 см (см. рис.). Ответ дай в квадратных сантиметрах.

Digital schools: Can tablets replace teachers? 10 September 2013 Last updated at 00:30 BST A number of schools in the Netherlands are pioneering a revolutionary method of learning - replacing teachers and textbooks with tablet computers. The country has seven such "digital schools" already running, with another three planned by the end of 2013. The schools' founder believes it reflects the reality of the growing digitisation of modern life but some teachers warn that not all aspects of teaching can be replicated by machine. Anna Holligan reports from Sneek.

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