3 1/5+2 1/4=16/5+9/4=(64+45)/20=109/20
109/20*5=109/4
109/4-25 5/6=109/4-155/6=(327-310)/12=17/12=1 5/12
7 6/7*1 9/11=55/7*20/11=100/7
3 1/7* 3/11=22/7*3/11=6/7
100/7+6/7=106/7=15 1/7
3 1/5+2 1/4=16/5+9/4=(64+45)/20=109/20
109/20*5=109/4
109/4-25 5/6=109/4-155/6=(327-310)/12=17/12=1 5/12
7 6/7*1 9/11=55/7*20/11=100/7
3 1/7* 3/11=22/7*3/11=6/7
100/7+6/7=106/7=15 1/7