1.(2 3 5 7 11 13 17 19)(4 6 8 9 10 12 14 15 16 18 20)
(9 15)
2.(1 2 4 8 16 32)(7 14 21 28 35 )
3.(4/9)
4.(0.28 2,.08 2又5分之4 20/7)
5.(10)
6.(1/3) (2/3) (0)
1.(2 3 5 7 11 13 17 19)(4 6 8 9 10 12 14 15 16 18 20)
(9 15)
2.(1 2 4 8 16 32)(7 14 21 28 35 )
3.(4/9)
4.(0.28 2,.08 2又5分之4 20/7)
5.(10)
6.(1/3) (2/3) (0)