Question

5 4/5 : (1 4/7 - 2 2/5) + 1 3/5

Answer 1

(5+4/5) / (1+4/7 - (2+2/5)) + (1+3/5) = - 5,4
5+4/5 = 29/5
1+4/7 = 11/7
2+2/5=12/5
(1+4/7 - (2+2/5)) =11/7-12/5=(11*5-12*7)/35=-29/35
(5+4/5) / (1+4/7 - (2+2/5))  = (29/5) / (-29/35) = -7
(1+3/5)=8/5
(5+4/5) / (1+4/7 - (2+2/5)) + (1+3/5)  = -7 + 8/5 = -6 + 3/5 = -(5+2/5) = - 5,4

Answer 2

попробую пояснить