1,25 - 1. 1/3=1 3/12 - 1 4/12= -1/12
-1/12 * (-5 1/7)= 1/12 * 36/7= 3/7
1 1/6 : 5 4/9= 7/6 * 9/49= 3/7
3/7+3/7= 6/7
1,25 - 1. 1/3=1 3/12 - 1 4/12= -1/12
-1/12 * (-5 1/7)= 1/12 * 36/7= 3/7
1 1/6 : 5 4/9= 7/6 * 9/49= 3/7
3/7+3/7= 6/7