11-(     )=5

12-(     )=3

(     )-2=11

(     )-5=6

(     )-9=6

(     )-6=10

(     )-2=16

17-(     )=10

(     )-5=11

(     )-1=18

(     )-6=12

15-(     )=5

18-(     )=3

(     )-1=13

18-(     )=8

19-(     )=1

(     )-13=7

19-(     )=16

(     )-4=10

16-(     )=6

(     )-7=5

20-(     )=11

13-(     )=7

(     )-13=1

17-(     )=2

(     )-14=6

(     )-7=5

16-(     )=11

(     )-2=18

(     )-10=2

(     )-0=16

(     )-6=14

(     )-13=0

14-(     )=5

18-(     )=13

(     )-16=1

18-(     )=1

17-(     )=7

(     )-16=2

14-(     )=11

(     )-9=5

(     )-2=9

15-(     )=12

(     )-15=0

20-(     )=13

(     )-1=17

18-(     )=0

(     )-13=6

11-(     )=3

15-(     )=12