(     )-2=10

20-(     )=15

11-(     )=1

17-(     )=4

(     )-8=4

(     )-16=4

(     )-11=7

(     )-6=5

(     )-11=4

(     )-12=5

14-(     )=6

(     )-7=6

(     )-2=13

(     )-12=5

(     )-15=3

13-(     )=9

16-(     )=11

18-(     )=18

12-(     )=8

(     )-0=14

(     )-11=1

16-(     )=6

17-(     )=17

(     )-8=5

(     )-8=9

14-(     )=9

15-(     )=14

13-(     )=5

18-(     )=11

(     )-9=3

(     )-13=1

18-(     )=2

14-(     )=8

(     )-0=12

17-(     )=17

(     )-8=3

(     )-7=8

15-(     )=5

15-(     )=13

19-(     )=11

(     )-1=15

19-(     )=10

(     )-8=11

(     )-11=3

16-(     )=4

(     )-11=1

15-(     )=9

16-(     )=14

19-(     )=10

(     )-11=5