9+(     )=20

(     )+16=18

(     )+10=18

9+(     )=14

11+(     )=11

12+(     )=15

(     )+4=19

10+(     )=19

(     )+0=19

(     )+2=15

(     )+2=14

(     )+7=20

14+(     )=19

(     )+0=19

5+(     )=14

8+(     )=20

15+(     )=18

6+(     )=18

13+(     )=15

(     )+4=20

(     )+2=18

(     )+5=19

(     )+3=14

1+(     )=16

(     )+2=18

(     )+0=12

7+(     )=18

11+(     )=11

(     )+3=18

(     )+6=18

(     )+18=20

(     )+14=14

10+(     )=15

5+(     )=16

0+(     )=18

6+(     )=14

(     )+4=13

7+(     )=18

(     )+11=11

17+(     )=17

(     )+10=17

4+(     )=14

16+(     )=20

15+(     )=19

(     )+0=19

4+(     )=13

(     )+11=14

15+(     )=19

(     )+11=13

(     )+7=15