ascending order 1 2/7 3/2 6/14
7.2×25÷10
ascending order 2/9 1/3 7/6 1/2
(0, 1) , (4, -1)
(7, 9) + (3, -5)
ascending order 11/15 1/6 5/10 4/3
15
----
30
14008-4800
ascending order 9/8 4/10 2/4 1 1/2
x.x.x+x-2/x-1
