(     )-1-9=4

18+(     )+0=20

12-7-(     )=2

14+2+(     )=18

18+(     )+0=19

14+(     )+3=20

17+(     )+0=19

11+(     )+7=18

15-(     )-1=6

10+(     )+3=13

(     )-10-1=4

(     )+1+8=11

7+(     )+3=15

17+3+(     )=20

(     )-5-13=2

14-5-(     )=9

(     )-12-3=4

18+(     )+1=19

(     )+2+0=20

14-(     )-4=8

(     )+2+0=20

3+(     )+1=20

16+3+(     )=19

17+(     )+0=17

17-13-(     )=3

11-(     )-0=2

(     )+5+0=17

12+6+(     )=20

13-(     )-4=4

18-11-(     )=0

3+3+(     )=17

14+1+(     )=17

(     )+6+3=12

13-8-(     )=0

12-6-(     )=1

16-10-(     )=2

(     )+19+0=20

17-(     )-7=2

(     )-7-12=0

13+(     )+1=18

(     )+11+3=14

20-16-(     )=0

14-2-(     )=7

12-2-(     )=8

4+10+(     )=14

(     )+0+4=19

(     )+2+0=20

7+(     )+6=19

19+(     )+0=19

17-5-(     )=4