Выполните действия(2целых4/9+1целая1/6)×1целая4/5-3 - вопрос №49502902491161453192132 от mikimouse9 23.12.2020 18:41

Question

Математика: Выполните действия(2целых4/9+1целая1/6)×1целая4/5-3 целых1/9: 2целых1/3 2)(7/10-2/5) ×(1/4+5/6): 6целых1/2

mikimouse9 · Answer

1) (2 4/9+1 1/6)*1 4/5-3 1/9:2 1/3 = (22/9+7/6)*9/5-28/9:7/3 = (44+21)/18*9/5-28/9:7/3 = 65/18*9/5-28/9*3/7 = 13/2-4/3 = (39-8)/6 = 31/6 = 5 1/6
2) (7/10-2/5)*(1/4+5/6):6 1/2 = (7-4)/10*(3+10)/12:13/2 = 3/10*13/12:13/2 = 39/120*2/13 = 6/120 = 1/20