3.5/9×1.1/8-11.1/5÷9.1/3=
32/9×9/8-56/5×3/28=
4-2/5×3=6-6/5=6-1.1/5=4.4/5
(1/2)+(3/7)=(7/14)+(6/14)=13/14
(1/3)+(1/8)=(8/24)+(3/24)=11/24
(5/6)+(1/3)=(5/6)+(2/6)=7/6=1 1/6
(5/24)+(5/6)=(5/24)+(20/24)=25/24=1 1/24
(1/4)+(1/6)=(3/12)+(2/12)=5/12
(1/6)+(2/9)=(6/36)+(8/36)=14/36=7/18