what is 9 1\2 + 12 11\20
1/2 of 11/20 is 10/20 so add that together. Then just add 9+12... sorry im not going to give answers but i hope that helps somewhat
9 1/2 + 12 11/10 = 19/2 + 131/10 (cuz u multiply 2 x 9 and add 1, and agaim w the other 10x12+11) = 150/10