Question

(2|5-2|7):2|7•2|5
(Это тема дроби)

Answer 1

(2/5 - 2/7) : 2/7 * 2/5 = 4/25
1) 2/5 - 2/7 = 14/35 - 10/35 = 4/35
4/35  :  2/7 = 4/35 * 7/2 = сокращаем 2и4, сокращаем 7и35 = 2/5
2/5  *  2/5 = 4/25

Answer 2

((14-10)/35):((2*7)/(5*7))=(4/35):(4/35)=1