(     )+10=12

16-(     )=1

9+(     )=18

(     )-4=7

(     )-9=8

(     )+1=17

(     )+5=18

15-(     )=3

8+(     )=20

(     )-6=8

(     )-9=7

7+(     )=11

(     )-2=17

(     )+0=18

(     )-13=6

16+(     )=18

(     )+17=18

(     )+8=19

13+(     )=14

13+(     )=19

(     )-5=8

14-(     )=13

13+(     )=17

(     )+5=16

(     )-6=10

13+(     )=14

14-(     )=2

15+(     )=20

0+(     )=10

(     )-8=5

(     )+13=20

15+(     )=15

11-(     )=11

10+(     )=18

(     )+14=15

11+(     )=19

(     )+3=19

9+(     )=12

(     )+8=16

(     )-11=5

17-(     )=13

17-(     )=7

11-(     )=7

(     )+5=15

(     )+14=19

(     )+4=13

19-(     )=13

(     )+7=14

12-(     )=4

18-(     )=12