a) 9/7 * 5/4 = 45/28 = 1 17/28
б) 14/3 * 2/5 = 28/15 = 1 13/15
в) 8/5 * 15/4 = 2 * 3 = 6
г) 4/9 * 11/4 = 1/9 * 11 = 11/9 = 1 2/9
д) 11/4 * 4/11 = 1
е) 7/4 * 12/7 = 3
ж) 13/4 * 4 = 13
з) 10 * 27/5 = 2 * 27 = 54
и) 23/6 * 30/23 = 5
к) 5/3 * 12/5 = 4
л) 80/11 * 99/40 = 2 * 9 = 18
м) 5/2 * 32/15 = 16/3 = 5 1/3
н) 0
о) 1 5/7 = 12/7
п) 0