20-19-(     )=1

(     )-0-12=4

19-(     )-0=6

17-9-(     )=8

(     )-14-2=2

20-12-(     )=5

(     )-3-10=0

15-0-(     )=7

11-1-(     )=6

19-(     )-12=7

13-(     )-8=4

(     )-13-2=2

(     )-1-6=7

(     )-6-12=2

11-(     )-0=1

12-(     )-1=6

16-3-(     )=0

11-3-(     )=6

20-(     )-9=5

16-(     )-1=2

16-(     )-11=4

11-1-(     )=1

19-0-(     )=6

17-(     )-6=10

(     )-9-2=3

16-(     )-6=8

17-(     )-1=5

(     )-11-0=5

(     )-6-3=11

19-8-(     )=3

17-2-(     )=3

14-3-(     )=11

(     )-1-9=3

(     )-5-4=5

11-10-(     )=0

(     )-1-7=6

(     )-14-0=2

(     )-9-1=2

18-16-(     )=2

(     )-11-0=5

17-2-(     )=1

15-(     )-4=8

(     )-2-3=10

(     )-3-5=5

17-9-(     )=3

15-6-(     )=9

11-(     )-0=1

19-(     )-2=0

14-(     )-6=2

11-1-(     )=5