Выполните действия (2/15+1 7/12)*30/103-2: 2 1/4*9/32 - вопрос №51560272151712301032214932 от timekid 09.04.2020 19:45

Question

Математика: Выполните действия (2/15+1 7/12)*30/103-2: 2 1/4*9/32

timekid · Answer

(2/15 + 1 7/12) * 30/103 - 2:2 1/4*9/32 = 1/4
1) 2/15+ 1 7/12 = 2/15 + 19/12 = 8/60 + 95/60 = 103/60
2) 103/60 * 30/103 = 30/60 = 1/2
3) 2 : 2 1/4 = 2*4/9 = 8/9
4) 8/9 * 9/32 = 8/32 = 1/4
5) 1/2 - 1/4 = 2/4 - 1/4 = 1/4