(     )-6-1=6

17-(     )-0=4

(     )-6-1=8

(     )-17-2=0

(     )-0-7=4

18-(     )-2=0

(     )-15-0=4

(     )-8-6=1

(     )-9-2=1

(     )-1-15=0

19-11-(     )=0

13-2-(     )=11

(     )-7-6=7

16-(     )-4=10

(     )-9-1=3

12-(     )-2=2

16-(     )-8=5

19-(     )-8=2

(     )-2-14=4

(     )-7-1=7

(     )-6-2=12

(     )-0-0=19

15-14-(     )=1

17-(     )-0=2

(     )-12-0=1

13-0-(     )=7

(     )-0-9=4

16-(     )-1=5

(     )-5-2=5

17-11-(     )=4

(     )-3-4=9

(     )-11-0=2

17-(     )-7=0

(     )-12-1=0

(     )-13-5=1

11-(     )-3=3

20-15-(     )=0

(     )-11-6=0

19-6-(     )=11

(     )-3-5=10

12-(     )-1=4

15-(     )-3=0

(     )-10-0=7

12-1-(     )=9

19-11-(     )=5

(     )-13-5=1

(     )-6-3=2

(     )-12-3=1

12-9-(     )=2

(     )-7-7=0