Question

7,2*2 1/12 :(15 1/5 - 11 1/2)

Answer 1

7,2 * 2 1/12 : (15 1/5 - 11 1/2) = 4 2/37

1)   15 1/5 = 76/5

2)   11 1/2 = 23/2

3) 76/5 - 23/2 = 76*2/5*2 - 23*5/2*5 = 152/10 - 115/10 = (152-115)/10 = 37/10  

4)   7,2 = 7 2/10 = 7 1/5 = 36/5

5)   2 1/12 = 25/12

6)   36/5 * 25/12 = 36*25/5*12 =  900/60 = 60*15/60 =15

7)  15 : 37/10 =15/1  * 10/37 = 15*10/1*37 = 150/37 = 4 2/37

Ответ: 4 2/37.