1、18- 5 = 17-11 = 13+ 6 = 17- 5 =
2、16-10 = 5 - 4 = 9 - 4 = 16- 1 =
3、3 +10 = 9 - 0 = 18+ 1 = 6 +10 =
4、4 - 0 = 18-12 = 17-17 = 10+ 2 =
5、10-10 = 9 - 0 = 15- 0 = 4 + 1 =
6、 5+16 = 2 + 2 = 13-12 = 4 +12 =
7、13+ 4 = 6 - 5 = 15-13 = 14+ 1 =
8、3 +12 = 0 + 0 = 0 +17 = 7 - 2 =
9、2 +14 = 11-10 = 11+ 4 = 10+ 4 =
10、14- 3 = 11- 1 = 3 - 1 = 13- 2 =
