Данное видео показывает, как проверить, истинна ли пропорция. Это видео - русский перевод лекции "Understanding Proportions" Академии Хана (https://www.khanacademy.org/math/arithmetic/rates-and-ratios/ratios_and_proportions/v/understanding-proportions) Наша страница на Facebook - http://www.facebook.com/KhanAcademyRussian This video is a Russian dubbed version of Khan Academy "Understanding Proportions". This video is a translation of a Khan Academy lecture available at https://www.khanacademy.org/math/arithmetic/rates-and-ratios/ratios_and_proportions/v/understanding-proportions Join us on https://www.facebook.com/KhanAcademyRussian