Вопрос школьника по предмету Математика
Полоска на рисунке составлена из 10 квадратиков со стороной 1. Сколько таких же квадратиков надо приложить к ней справа, чтобы периметр полоски стал в два раза больше?
варианты ответов: (А) 20 (Б) 12 (В) 11 (Г) 10 (Д) 9
Ответ учителя по предмету Математика
ответ В
ПЕРИМЕТР 10+10+1+1 = 22 см
прикладываем 11 квадратиков и получаем
21+21+1+1 = 44 см
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