1) 3 - 2 5/9 = 4/9
2) 4/9 : 1/12 = 4/9 × 12 = 16/3
3) 1,35 - 4/5 = 1 /20 - 4/5 =1 1/12
4) 1 1/12 × 3/13 =13/12×3/13=1/4
5) 1/4+2 5/12=2 2/3
6) 16/3 : 2 2/3 = 16/3 ×3/8 =2
7) 7/18 +5/13 -2/3 =5/36
8) 5/36 ×9/10 = 1/8
9) 2 1/15 +1/3 = 2 6/15=2 2/5
10) 1/10 : 2 2/5 = 1/10 : 12/5 =1/10 ×5/12 =1/24
11) 1/8 : 1/24= 1/8 ×24/1=3
12) 2+3=5