а) 9/10 5/12 = 45/120 = 3/8б) 3/5 : 11/5 = 3/5 5/11 = 15/55 = 3/11в) 21/22 2/5 = 42/110 = 21/55г) 7/8 : 7/16 = 7/8 16/7 = 112/56 = 2д) 1 3/5 2 1/2 = (5+3)/5 (22+1)/2 = 8/5 5/2 = 40/10 = 4е) 1 3/4 10 1/2 = (4+3)/4 (210+1)/2 = 7/4 21/2 = 147/8 = 18 3/8
а) 9/10 5/12 = 45/120 = 3/8
б) 3/5 : 11/5 = 3/5 5/11 = 15/55 = 3/11
в) 21/22 2/5 = 42/110 = 21/55
г) 7/8 : 7/16 = 7/8 16/7 = 112/56 = 2
д) 1 3/5 2 1/2 = (5+3)/5 (22+1)/2 = 8/5 5/2 = 40/10 = 4
е) 1 3/4 10 1/2 = (4+3)/4 (210+1)/2 = 7/4 21/2 = 147/8 = 18 3/8