20以内三连减口算练习题(202).docx

《20以内三连减口算练习题(202).docx》由会员分享，可在线阅读，更多相关《20以内三连减口算练习题(202).docx（55页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、19-2-11=10-6-4=13-6-1=20-9-2 =13-10-1 =20-2- 12=18-12-5 =9-6-1=18-5-7=15-9-5 =19-5- 14=19-14-2 =18-15-3 =17-2-5=17-1-9=14-7-7=19 - 16 - 3=15 - 3 - 11=12-3-3 =8-1-2=20 - 1 - 14=17-8-8=19 - 10 - 9二18 - 3 - 12=17-8-7=17-3-13 =20-6-8=8-1-3=12-5-5=15-5-5 =12-1-9=17-1-7=17-7-1 =17-9-3 =16-1-12 =18-5-9=17-

2、7-3 =7-1-6=16-7-5=16-1-8=19 - 13 - 1=13-5-4=17-4-1=20-2-8=17-4-13 =15-7-7=11-3-6=4-3-1=19-8-6=18-5-8=18-11-4=17-1-6=17-2-3 =19-3- 10=14-4-5二9-8-1二 20-15-1=19-1- 17=8-3-1=16-3-2 =7-2-2=20 - 10 - 1=12 - 1 - 11 = 20-4-15= 18-5-11=16-1-5 =19-6-13 =16-9-2=15-10-3 =19-5-8=17-3-6=15-5-2 =12-2-6=8-2-5=14-3-

3、4=15-3-3 =13-4-7=18-8-8=18-8-5=18-7-3 =18-7-6=12-6-2 =18-2-11=20 - 11 - 5=19 - 12 - 7=16-5-4=13 - 1 - 11=13 - 10 - 2=19-2-15 =20-7-2 =17-3- 14=19-7-7=8-3-3-18-1-6=17-4-9=20-4-8=20-3-8=18-2-9=16-5-2 =16-1-15 =19-4-6=9-5-3=20-1-1=11-2-8=7-4-3=7-1-4=19-13-2 =18 - 12 - 1=14-11-2 =14-7-4=16-6 - 10=13-4-3

4、 =20-5-11 =18-8-7=17-4-6=18-2-6=4-2-2=20-14-1 =15-8-1 =15-3-9=17-1- 16=20-1-15=11-4-3 =15-3-6=17-8-6=16-8-1=18-2-2 =17-1- 14=6-4-1=19-7-12 =4-1-3=16-8-4=15-5-9=20-5-15 =20-4-12 =19-5-3 =20-5-9=17-4-4=13-2- 10=20-7-4=14-5-8=20 - 16 - 1=18-7-8=18 - 1 - 15=19-2- 16=18-6-4=15-4-6=17-5- 12 =12-5-1=17-3-8

5、=19-6-8=16-9-4=17-10-2 =13 - 12 - 1=15-3-2 =8-2-1二20 - 10 - 6=20-3-16=19-1-3 =11-5-5 =15-2-9=13-4-1=19-3-15 =11-8-2 = 16-5-11= 20-2- 17= 17-4-11 =20 - 12 - 8=18 - 14 - 1= 20-15-5=16-3-5=15-2-7=18 -13 - 3 =19-9-2 = 20-8-2 = 12-3-4= 20-3-6=8-3-4=20-2-2 =17 - 15 - 1二13-7-1 =19-6-1 =18-11-3 =18 - 5 - 10

6、=18-5-4=14-5-2 =16-2-6=13-3-1=8-5-3=18 - 15 - 1=14 - 12 - 1=17-6-3 =11-7-1 =19-6-11 =20-5-8=5-3-1=18-15-2=15-6-2 =18-2-10=20-5-3 =14-7-5=16-2-13 =20-2-13 =16-1-9=12-4-3 =15-2-1=11-2-4=14-5-4=14-5-7=16-3-3 =13-8-2=10-3-3 =20-6-13 =10-5-2=17-5-5 =13-4-4=14-6-1 =14-1-8=5-3-2=19-6-6=19-1-9=15-2- 10=20-5

7、- 10=19-1- 10=18-4-8=20 - 19 - 1=17-7-2 =20-7- 10=18-7-1 =15-8-6=20-12-3 =17 - 14 - 1二13-1-9=19-8-11=20-9-9 =12-1-2 =16-8-8=14 - 12 - 2二10-2-5 =10-3-4=13-8-1=19-4-10=17-2-1=6-4-2=12-5-7=13-2-9=7-2-5=14-7-2 =18-2-4=17-11-3 =19 - 10 - 3 =17-2-2 =20-6-1二16-11-3 =13-8-4=17-2-11=18-1-11=18-4- 14=20 - 13

8、- 1=20 - 14 - 6=10-4-4=15-8-5=16-8-3 =5-2-3=20 -13 - 2=15 - 11 - 3二5-4-1=20-6-7=10-1-5 =15-4-10=15-7-5 =15-7-2 =17-5-7=19 - 16 - 1=14-3- 11=16-8-6=14-5-5 =16-6-5 =11-2-5=20-5- 12=4-2-1=16-10-3 =15 -11-4=16-5- 10=16-5-3 =7-3-4=12-8-2 =14-1-4=16 - 10 - 1=15-8-3 =17-2-9=15-4-1=11-2-1=6-2-1=15-2-11=15-5

9、-7=13-4-5=20-9-5=17-6-2 =11-6-2 =12-7-3 =16-6-1 =20-10-2 =20 - 16 - 4= 16-4-10= 19-2- 14= 16-1- 14= 15-10-1=7-1-2=18-5-3 =14-2-12 = 20-2- 16=17-9-6=18 - 14 - 4=16 -10 - 2= 19-5-4=9-6-3= 19-9-6= 17-7-5 =13-1- 10= 12-5-4=19 - 13 - 5=8-1-4=18-9-9=14-1- 10=14-4-3二16-4-4=10-1-1=18-6 - 10=12-5-2 =6-3-3=16

10、-1-1=15-3-12 =16 -10 - 5=10-5-4=10-3-7=19-6-9=14-6-5 =11-10-1=13-4-2 =15 - 1 - 14=10-1-6=18 - 11 - 2=15-2-3 =17 - 3 - 12 = 8-4-1=17-8-2=17 - 11 - 1二15-10-4=14-6-3 =19-8-7=17-1-11=15-1-9=17 - 13 - 1 二 20-3-15 =18 - 13 - 1二19 - 2 - 10=18-2-5=10-6-2二18-4-13 =10-4-5=17-4-12 =18 - 17 - 1=18-8- 10=17-1- 1

11、0=17 - 1 - 15 =15-6-6=19-4-7=8-1-5=12-1-7=7-1-5=8-3-5=14-8-5 =20-10-3 =10-6-1 =20-5-4=6-1-4=9-7-2=13-3- 10=20-3-2 =15-1-1 =19-5-11 =19 - 12 - 4=19 -15-4=17-6-5 =19-6 - 10=20 - 17 - 1=17-2-6=20-7-7=18-4-10=18-2-13 =13-8-5=13-2-2 =20 - 13 - 7=20 - 10 - 8=12-4-4=16-6-8=17-6-9=15-7-6=15-8-2 =14-2-7=14-1

12、0-3 =16-3-7=9-3-2=15 - 1 - 11 =18 - 10 - 5 =16-2-4=17-1-4=20-5-2 =16-1-7=9-1-3=19 - 10 - 5 =12-1-6=20-1- 19=12-1-4=14-2-1=16-4-1=16-5-7=16-9-1=12-3-9=15 - 1 - 13 =12-8-4=15-5-6=19-3-3 =14-6-4=13 - 1 - 12=19 - 15 - 3二6-1-2=20-1-11=14-2- 10=17 - 12 - 5二15-4-2 =14-8-4=14-4-7 =12-6-1=18 - 10 - 2 =8-2-2=

13、12-6-3 =19-6-4=20-1-8=20-2-3 =16-2-11=19-3-1 =19-9-7=14-1-3 =19-8-8=16-3-4=20-9-1 =20 - 14 - 4=20-5-5 =6-1-3=7-5-1=20-1-2 =20-8-6=19-5-5 =9-4-5=17-1-8=18-6-3 =20 - 12 - 6=19-7- 10=15-7-3 =10-1-9=20-8-4=18-7-5 =15-2-13 =20-3-5=11-1-4=17-5-4=12-4-7=14-4-9=18 - 13 - 5=10-1-8=11-5-4=20-8-11 =20-5-6=9-1-

14、6=18-4-6=13-2-8=14-1-6=20-11-1=16-3- 10=17-5-6=10-2-3 =15-9-1=19-6-12 =17-9-4=18-8-4=7-1-1=14-5-6=20 -11 - 7=10-5-5 = 18-3-1=10-2-1 =19 - 11 - 6=20-2-15 =15-1-6=19 - 12 - 1 = 15-7-1=19-7-2=19 - 5 - 13 =19 - 12 - 2=20-6-6=19-8- 10=8-2-3=9-6-2=14-4-1=17-4-7=13-3-3 =14-1-9=16-2- 10=20-4-6=16 -11-4=5-1-

15、4=18-7-9=11-6-1=11-1-6=20 - 11 - 8=10-6-3 =16-4-6=15-11-2=9-5-1=14 - 10 - 2=20-9-8=18 - 12 - 2=18-7-2 =9-3-3=18-9-5 =16-2-1=11-5-2 =16 - 12 - 4=20-1-7=16-3-8=16 - 14 - 2=16-6-4=14-9-1 =19-4-11 =15-2-4=9-1-8=19-4-8=17-2-13 =17-9-7=15-13-2=19-5-1 =20 -14 - 5=20-17-3 =11-2-6=18 - 10 - 6=16-2- 12 =18-2-

16、3 =14-3-1 =20 - 10 - 4=12-3-1 =13-6-7=20-1- 12 =10-2-2 =17 - 10 - 1=15-5- 10=19-11-2 =3-2-1=20-1- 17=13-5-8=17 - 2 - 14=17-8-3 =18-4-7=11-3-1=20 - 10 - 9二11-3-7=20-8 - 12 =8-3-2=13-6-2 =20-3-1=18 - 10 - 8= 17-14-2 = 19-15-1=15 - 1 - 12=17 - 10 - 3二20-6-5=20 -15-4=14-3-5 =19 - 1 - 12=20-6 - 14=15-1-7

17、=10-3-5 =12-9-2 =17-4-3 =18-12-4=16-4-9=17-7-6=13-1-8=8-7-1二16-6-6=20 -18 - 2=19-7-3 =19-4-13 =15 - 11 - 1=2-1-1=20-9-6=16-1-11=7-4-2=11-4-6=18-7 - 10=10-4-3 =6-1-5=11-9-2 =11-2-2 =20 - 3 - 13 =20 - 3 - 17=19-8-1=19-3-6=20-4-11 =17-6-7=14-6-6=13-1-2 =16-7-3=12-2-2 =11-2-9=12-7-5 =19-7-9=19-10-2 =19-

18、6-3 =9-4-3二16-4-11=20 - 12 - 7=15 -12 - 2=17 - 13 - 4=14-4-8=9-3-5=20-4-9=4-1-1=9-3-4=18-3-13 =9-3-1=11-1- 10=3-1-1=19-3-7=16-11-5=18-4-1=16-7-6=16-3-12 =16-4-3 =19-10-1 =17 - 5 - 11 =15-6-1 =17-13-2 =10-8-2 =19-13-4=17-5-2 =15-2-5=20-1- 16=12-2-9=19-2-1 =18-1-9=17-7-7=20-9 - 10=15-6-5 =4-1-2=20-8 -

19、 10=5-2-2=11-1-5=19 - 12 - 5 =13-1-5 =10-1-7=9-5-2=20-7-5 =13-3-4=14-2-9=17-7- 10=20-6-2 =20 - 10 - 7=14-9-2 =14-1-2 =18-2- 14=13-10-3 =20-9-3 =19-6-5 =20-13-3 =19-13-3 =18-1- 14=17-13-3 =18-1- 10=11-3-3 =19 -11-4=19-2-2 =16-5-9=9-4-2=6-5-1=20-8-3二19 - 10 - 7=18-3-7=16-13-3 =19-1-7=13-6-4=19 - 5 - 1

20、0=19-14-5 =6-1-1=7-2-1=11-6-3 =13-8-3 =19 - 10 - 4=18-13-4=19 - 14 - 4二9-2-4=19-5-7=17 - 12 - 1=20-7-9=13-7-5 =15-7-4=18-4-11 =7-1-3=14-1-5 =19-5-9=18-5-2 =15-2-8=8-4-4=19 - 11 - 5二14-2-5 =18-8-3 =13-2-3 =10-8-1=12-9-3 =17 - 1 - 12 =20-14-3 =16-8-7=14-3-3 =20-7-13 =18-6-12 =9-4-4=14 - 11 - 3二8-4-2=1

21、9-9-9=18-1- 16=19-4- 14=10-2-4=16-5-5=15-1-4=17 - 16 - 1=20-8-5 =14-3-2 =10-2-8=13-5-2=9-1-5=17 - 15 - 2=18-1-5 =12 - 10 - 1二17-9-5 =20-5-13 =11-1-7=16-1-6=17-7-4=16-2-3二19-5-2 =17-3-9=10-2-7=17-1-2=12-7-4=13-2-4=19-2-6=13-11-1=19 - 10 - 6=13-3-6=19-2-4=6-3-1=14-9-3 =14-5-9=14-4-2 =5-1-1=18-3-2 =18

22、- 11 - 6=20-6-4=20-2- 10=18-7-11=19-3-13 =19-3-9=19 - 3 - 12=18-5-5 =11-4-5 =10-4-2=16-7-9=12-7-1=15-3-10=20 - 11 - 3二16-2-9=18-1- 17=14-8-3二15-1-5 =15-1-8=14-5-1=20-11-9=16-2-7=18-5-1=12-3-5=17 - 10 - 4=14-2-3 =10-4-6=19-1-4=19-2-9=14-4-6=19-11-3 =18-7-4=11-5-1=8-5-2=15 - 14 - 1=19-1-13 =16-1-2 =20

23、-7-12 =10-7-3 =8-1-1=18-8-9=15-9-3 =18-7-7=13-1-7=20-2-5二18-5-13 =17-1-1=19-8-3 =8-2-6=20-2-4=7-6-1=11-1-1 =20-1-13 =20 - 10 - 5 =15-4-4=19 - 12 - 3二13-5-6=8-5-1=14 - 11 - 1=20-4-2 =6-2-4=11-6-5=7-5-2=17-5-8=17-2-7=12-3-2 =19-8-4=14-6-2 =16-5-1=19-7-1 =16-7-8=13-2-7=14-7-3 =12-2-5 =19 - 10 - 8二8-6-2

24、=13-1-6=9-2-1=20 -13 - 5=16-7-1=15-5-3 =20-7-8=20-1-3 =12-8-1=12-9-1=16-3-11 =13-1-3 =14-3-7=20 - 12 - 1=13-7-3 =20-8-9=18 - 12 - 6=14-1-7=17-7-3 =7-1-6=16-7-5 =16-1-8=19 - 13 - 1=13-5-4=17-4-1 =20-2-8=17-4-13 =15-7-7=10-1-4=13-9-3 =12-2-4=13-5-1=18 - 16 - 2 =17-5-1=19 - 2 - 11 =10-6-4=13-6-1=20-9-2

25、二13 - 10 - 1=20-2- 12=18 - 12 - 5 =9-6-1二18-5-7=15-9-5 =19 - 5 - 14=19-14-2 =17-9-8=10-3-1=16 -10 - 4=17-2-15 =13-5-3二14 - 10 - 4=12-3-3 =8-1-2=20 - 1 - 14=17-8-8=19 - 10 - 9二18 - 3 - 12 =17-8-7=17-3- 13 =20-6-8=8-1-3=12-5-5 =15-5-5 =4-3-1=19-8-6=18-5-8=18-11-4=17-1-6=17-2-3 =16-2- 14=14-5-3 =15 -12

26、 - 2=17 -13 - 4=14-4-8=9-3-5=20-4-9=4-1-1=9-3-4=18-3-13 =9-3-1=11-1- 10=17-2-5 =17-1-9=14-7-7=19-16-3 =15 - 3 - 11=11-4-1=17-7-6=13-1-8=8-7-1=16-6-6=20 - 18 - 2 =19-7-3 =19-4-13 =15 -11 - 1=2-1-1=20-9-6=16-1-11=7-4-2=17-7-1 =17-9-3 =16-1-12 =18-5-9=19-7-11 =20-3-13 =20 - 3 - 17=19-8-1=19-3-6=20-4-11

27、=17-6-7二14-6-6=13-1-2 =16-7-3 =12-2-2 =11-2-9=12-7-5=19-3-7=16-11-5 =18-4-1 =16-7-6=16-3-12 =16-4-3 =11-8-1 =8-4-3=15-3-1 =19-11-7=20-5-1 =19-2-7=18-5-6=12-4-8=18-9-3 =13-1-1 =14-8-6=14-4-4=18-7- 10=10-4-3 =6-1-5=11-9-2 =11-2-2 =20-3-9=10-7-2 =11-7-2 =14 - 13 - 1=18 - 11 - 1 =19-9-4=11-3-2 =16-3-1=1

28、3-3-5 =19-1-14=19-2-5 =11-3-4=19-6-2 =19 - 10 - 2 =19-6-3 =9-4-3=16-4-11=20 - 12 - 7=9-1-7=15-6-9=18-9-8=18-4-12 =19-1-1 =9-2-6=13-2-11=19-2-8=18-4-4=19-9-3 =19 - 5 - 12 =12-3-6=14-1-1=20-4- 14=18 - 10 - 4=20 -15 - 2=20-1- 18=7-4-1=10-1-3 = 11-2-7=17-1-3 = 20-4-7=12-1-1 =17-3-3 =11-3-8=18 - 16 - 1=

29、19-7-4=19-1-8=16-6-7=14 - 10 - 1= 20-8-7=18-4-9=15-3-8=20-4- 10=19-7-5 =14-3-6=12-4-2 =17 - 12 - 3二18-9-4=18-4-2 =13-3-8=19-3-5 =10-9-1=13-4-6=10-7-1=19-9-1=17 - 10 - 5二15-10-5 =12-10-2 =16-7-7=17-6-8=18-2- 16=20-2-1=13-4-8=15-12-3 =20 - 3 - 12 =12-1-5=11-1-8=15 - 12 - 1=8-1-7=15-10-2 =15-4-8=17-3-4

30、=12-3-8=19-9 - 10=17-14-3 =19-1-2 =20-3-7=15-2-6=18-9-1=18-1-8=16-11-1 =14-3- 10=19-3-16=20-4-16=19-8-9=19-2- 17=16-1- 10=13-5-7=15-4-5 =18-3-4=11-4-4=17-11-5 =18-6-9=20-6-9=16 - 12 - 1=18-6-5=17 - 12 - 2=13-2-6=11-1-2 =19 - 17 - 1=19-1-5 =20-3-3 =16-3-6=14-1- 12=14-3-8=16-3- 13 =19-3-8=18-9-6=15-9-

31、2二16-9-7=15-5-1=18-6-2 =15-1- 10=19-5-6=11-4-2=10-3-6=15-4-9=20-2-11 =12-3-7=20 -11 - 6=15-6-7=16-5-6=20-5- 14=12-6-6=19-4-12 =20-1-4=13-4-9=18 - 10 - 1=18-1-3=19-3-4=19 - 13 - 6=20-8-8二7-3-3=19-8-5=12-6-4=18 -14 - 2=16-3-9=14-7-6=18-1-4=7-3-1=6-2-3=17 - 12 - 4=13-9-1=5-2-1=8-6-1=20 - 13 - 6=20-2-7=

32、17-7-9=13-11-2=19-14-3 =14-2-2 =8-1-6=15-4-3 =15-3-7=15-5-8=20-6-12 =19 - 14 - 1=13-2-1=12-5-3 =14-4- 10=17-5-9=6-2-2=15-2-2=20-3-11=17-4- 10=12-8-3 =18-3-8=20-9-11 =19-2-3 =11-1-9=20-2- 14=20-5-7=12-7-2 =16-2-8=20-11-2=17-3-2 =18-14-3 =18 - 3 - 10=20-2-6=20-1-6=20-6-3 =19-7-6=10-7-2 =11-7-2 =14-13-

33、1 =18-11-1 =19-9-4=11-3-2 =16-3-1=13-3-5=19-1- 14=19-2-5 =11-3-4=19-6-2 =20-4-5=18-4-9=15-3-8=20-4- 10=19-7-5 =14-3-6=15-6-9=18-9-8=18-4-12=19-1-1=9-2-6=13-2-11=19-2-8=18-4-4=19-9-3 =19 - 5 - 12=12-3-6=14-1-1=14-3-9=16-7-7=17-6-8=18-2- 16=20-2-1二13-4-8=15-3-1=19-11-7=20-5-1=19-2-7=18-5-6=12-4-8=18-9

34、-3 =13-1-1=14-8-6=14-4-4=16-2-5=20-4- 14=18 - 10 - 4=20-15-2 =20-1- 18=7-4-1=10-1-3 =20 - 12 - 5=17 - 10 - 7=20-4-1 =16-2-2 =14-9-4=16 -12 - 2=12-1-3 =19-3-11=20-6-11 =11-9-1=13-9-4=19 -18 -1=14-2-4=15-3-5 =13-1-4=17-1-13 =9-3-6=16 - 14 - 1=17-11-2 =16-9-3 =15-9-6=12-4-5 =10-2-6=16-12-3 =17 - 3 - 11

35、=19-1-6=18 - 5 - 12 =19 - 12 - 6=17-5-3 =9-2-7=17-6-4=16-7-4=18-10-3 =13-7-4=3-1-2=11-7-4=17 - 10 - 6=16 -13 -1=12-5-6=19 - 1 - 15 =16-4-2=13-3-2 =20-8-1二17-8-9=17-2- 10=17-4-5 =19-16-2 =12-4-6=15-4-7=13-9-2二20-1-9=20-16-3 =20-9-4=18-4-3 =18-8-1 =14-2-11 =16-8-2 =15-1-2 =11-5-6=19-4-9=18-13-2 =19-1-

36、11 =17-9-1=17-6-1=15-3-4=19 - 3 - 14=19 - 11 - 8 二17-2-12 =10-3-2 =16-7-2 =11-8-3 =11-4-7 =18-3-6=9-2-2=18-6-6=17-8-4=10-5-3 =17 - 3 - 10=16-15-1=16-1-3 =8-2-4=20-7-1=18 - 3 - 11=14-8-2 =12 - 11 - 1=19-4-1=20-7-3 =13-5-5=16-1-4=18-2-7=17-1-5 =9-4-1=17-2-4=6-3-2=19 - 11 - 1=19-1- 18=17-6-6=18-1- 13 =

37、15-6-3 =18-6-1=16-8-5 =19-3-2=18-6-8=20 -16 - 2=17-2-8=10-5-1=7-2-4=20 - 10 - 10=16-6-9=20-3-4=7-2-3=17-3-7=20 -17 - 2= 16-4-12=20-2- 18=16-11-2 =13-7-6=17-8-1 =19-4-5 =18-3-5=18-1-1 =17-11-4=9-2-3=17-6 - 10=15-6-8=17-3-1=17-7-8=20-2-9=19-2-12 =18 - 10 - 7=12-2-8=20-6 - 10=14-1-13 =17-3-5=15-5-4=19-

38、8-2 =15-8-7=14-8-1=19-4-4=15-9-4=15-6-4=19-2-13 =18-11-7=18 - 3 - 14=18-8-6=18-2-1=11-1-3 =16-5-8=19-9-8=15-7-8=16-1-13 =10-4-1=16-6-2 =18-2-8=19-6-7=9-7-1=20 - 3 - 10=18 - 1 - 12=12-6-5=16 - 10 - 6=18-3-3二12-1-8=12-2-7=19-7-8=12-2- 10=19-4-15 =20-4-13 =20-7-2 =17-3- 14=19-7-7=8-3-3=18-1-6=17-4-9=20

39、-4-8二20-3-8=18-2-9=16-5-2 =13-7-2 =11-5-3 =20 - 14 - 2=18-3-15 =19 - 17 - 2=20-7-6=19-3- 10=14-4-5 =9-8-1=20 - 15 - 1=19 - 1 - 17=8-3-1=16-3-2 =7-2-2=20 - 10 - 1=12 - 1 - 11= 20-4-15=18 - 5 - 11=9-1-1=14-2-8=20-1- 10=10-1-2 =16-6-3 =15-5-2 =12-2-6=8-2-5=14-3-4=15-3-3 =13-4-7=18-8-8=18-8-5 =18-7-3 =1

40、8-7-6=12-6-2 =18-2-11=19-4-6=9-5-3=20-1-1=11-2-8=7-4-3=7-1-4=11-2-3 =18-7-8=18-1-15 =19-2- 16=18-6-4=15-4-6=17-5-12 =12-5-1=17-3-8=19-6-8=16-9-4=17-10-2 =19-6-13 =16-9-2=15-10-3 =19-5-8=17-3-6=13-2-5=19-13-2=18 - 12 - 1=14 - 11 - 2 =14-7-4=16-6 - 10=13-4-3 =20 - 5 - 11=18-8-7=17-4-6=18-2-6=4-2-2=20 - 14 - 1=16-5-4=13-1-11 =13-10-2 =19-2-15 =5-1-3=17-8-6=16-8-1=18-2-2 =17-1- 14=6-4-1=19-7-12