(     )-4=13

(     )-14=4

(     )-12=1

(     )-0=17

(     )-16=0

(     )-1=19

(     )-9=6

16-(     )=1

20-(     )=3

13-(     )=13

15-(     )=10

(     )-2=15

(     )-0=11

(     )-5=14

(     )-8=8

(     )-6=5

14-(     )=8

15-(     )=10

(     )-8=5

12-(     )=11

20-(     )=5

(     )-3=8

(     )-5=13

11-(     )=7

(     )-14=3

(     )-11=3

(     )-19=1

(     )-11=9

20-(     )=12

14-(     )=7

17-(     )=12

12-(     )=1

11-(     )=8

(     )-3=13

(     )-5=11

13-(     )=0

(     )-6=11

14-(     )=6

(     )-13=2

(     )-12=5

(     )-7=11

(     )-3=10

19-(     )=5

(     )-17=2

(     )-3=16

12-(     )=7

11-(     )=2

11-(     )=7

(     )-9=3

20-(     )=5