1) (2/7+5/21): 2 2/152) (8/11+3/22): 5/113) 1 7/12:(3/8+5/12)4) 17/36: (7/12-5/9)5) (3/14+5/7): 3 5/76) 19/24:(3/16+ 5/24) = 19/24:(1/4+5/24) = 19/24:(6/24+5/24) = 19/24:11/24 = 19/24*24/11 = 19/11 = 1 8/11
1) (2/7+5/21): 2 2/15
2) (8/11+3/22): 5/11
3) 1 7/12:(3/8+5/12)
4) 17/36: (7/12-5/9)
5) (3/14+5/7): 3 5/7
6) 19/24:(3/16+ 5/24) = 19/24:(1/4+5/24) = 19/24:(6/24+5/24) = 19/24:11/24 = 19/24*24/11 = 19/11 = 1 8/11