42-(     )=21

50-(     )=44

(     )-8=15

42-(     )=41

27-(     )=2

(     )-7=31

(     )-32=18

(     )-1=49

30-(     )=13

41-(     )=27

(     )-7=37

(     )-8=21

(     )-10=29

(     )-19=17

(     )-18=11

(     )-30=13

42-(     )=9

26-(     )=19

38-(     )=7

26-(     )=9

(     )-12=34

(     )-33=1

(     )-10=11

25-(     )=7

45-(     )=45

36-(     )=18

(     )-25=13

(     )-19=21

(     )-14=16

(     )-0=39

34-(     )=5

25-(     )=12

(     )-18=16

(     )-6=29

39-(     )=26

35-(     )=7

(     )-33=9

37-(     )=4

(     )-13=11

(     )-5=28

37-(     )=0

28-(     )=1

(     )-0=27

(     )-13=18

(     )-7=25

36-(     )=8

(     )-9=12

34-(     )=0

(     )-12=26

47-(     )=3