(     )-21=4

(     )-18=19

(     )-7=31

(     )-10=11

(     )-0=24

(     )-23=18

(     )-16=9

(     )-20=2

(     )-34=13

(     )-2=21

(     )-26=0

(     )-9=29

(     )-15=12

(     )-18=26

(     )-37=12

(     )-5=23

(     )-30=6

(     )-25=18

(     )-21=26

(     )-7=25

(     )-13=20

(     )-16=8

(     )-32=4

(     )-12=21

(     )-12=29

(     )-33=3

(     )-7=21

(     )-3=18

(     )-15=12

(     )-43=7

(     )-14=32

(     )-15=13

(     )-15=12

(     )-11=10

(     )-7=27

(     )-25=8

(     )-11=23

(     )-47=3

(     )-29=11

(     )-6=20

(     )-6=27

(     )-29=12

(     )-48=2

(     )-27=7

(     )-0=22

(     )-19=20

(     )-36=1

(     )-29=5

(     )-24=15

(     )-49=1