1) 6,9+2 11/20 = 6,9 + 2,55 = 9,45
2) 9,45 * 2 3/5 = 9,45 * 2.6 = 24.57
3) 3.5 * 2.7 = 9.45
4)24.57 - 9,45 = 15.12
5)2 1/12-1 1/18 = 37/36
6)37/36 : 9 1/4= 37/36 : 37/36 = 1
7)8 1/9- 1= 7 1/9
8)15.12 - 7 1/9 = 8.01
