328 не бачу

330

1) 2*3/5*10 = 6/50 = 3/25

2) 4*7/5*10 = 28/50 = 14/25

3) 2*6/3*7 = 12/21 = 4/7

4) 4*3/9*11 = 12/99

5) 4*7/5*12 = 28/60 = 14/30 = 7/15

6) 10*7/13*10 = 70/130 = 7/13

7) 5*6/12*7 = 30/84= 15/42

8) 4*3/7*8 = 12/52 = 6/26 = 3/13