12-(     )-1=11

15-6-(     )=1

11-(     )-5=3

(     )-10-0=5

15-0-(     )=1

(     )-7-1=9

(     )-9-1=1

19-16-(     )=3

16-(     )-8=2

15-4-(     )=9

(     )-7-0=10

15-(     )-4=2

19-14-(     )=1

15-(     )-8=3

15-(     )-5=6

13-(     )-1=0

13-2-(     )=11

(     )-7-1=5

(     )-12-0=7

(     )-7-2=6

18-5-(     )=1

11-(     )-0=8

17-(     )-1=2

(     )-11-1=2

20-10-(     )=10

13-4-(     )=6

14-13-(     )=1

14-7-(     )=5

(     )-3-11=6

17-(     )-1=3

(     )-0-14=4

14-(     )-5=3

18-(     )-12=4

11-(     )-1=5

19-3-(     )=9

(     )-5-3=8

16-12-(     )=3

12-7-(     )=2

11-5-(     )=4

(     )-3-16=1

16-9-(     )=7

(     )-10-4=4

16-(     )-6=6

11-(     )-4=0

19-14-(     )=4

(     )-17-0=2

(     )-13-6=0

18-(     )-11=3

(     )-10-3=1

(     )-10-0=1