18-12-(     )=5

(     )-13-2=4

(     )-16-0=2

19-4-(     )=7

19-(     )-3=2

(     )+2+0=18

20-(     )-4=16

15+5+(     )=20

(     )-1-5=8

(     )+1+2=18

(     )+1+10=20

(     )+15+0=20

18-1-(     )=2

18-6-(     )=12

(     )+12+0=18

(     )+1+0=16

16+1+(     )=20

(     )-0-3=13

15-12-(     )=1

(     )-11-6=1

19-13-(     )=6

(     )+12+0=18

(     )-2-18=0

11-(     )-0=4

9+3+(     )=15

(     )+7+3=20

(     )-3-12=1

13-(     )-12=1

15-(     )-3=1

15-(     )-13=0

(     )-14-1=0

(     )+2+13=16

(     )-1-11=2

(     )-3-6=2

(     )+4+0=20

(     )-6-5=1

(     )-2-1=8

(     )-15-1=0

15-(     )-3=1

1+2+(     )=18

12-(     )-6=1

19-14-(     )=5

1+(     )+3=20

16-11-(     )=5

15+(     )+2=17

(     )+2+0=20

7+(     )+0=15

6+13+(     )=20

11-7-(     )=1

13-(     )-6=3