13-6= 8+7= 11-3= 14-5=
6+9= 15-7= 17-8= 14-7=
9+6= 11-7= 12-7= 3+8=
14-6= 13-5= 4+8= 12-9=
8+6= 16-7= 13-4= 11-9=
13-5= 6+8= 10+10= 1+12= 13-5=
2+16= 7+7= 5+8= 8+5= 20-6=
15-5= 20-3= 3+16= 2+14= 5+3=
15- ( )=7 4+( )=11 11- ( )=5
( ) -9=3 9+( )=14 12- ( )=8
7+( )=12 13- ( )=6 ( )+6=11
13- ( )=4 ( )+8=15 ( ) -6=6
( )+7=10 ( )+5=11 7+( )=16 5+( )=12
9+( )=15 ( )+4=12 5+( )=14 ( )+2=11
12-5= 16+2= 4+3= 9+10= 8+6=
19-1= 15+5= 6+6= 18-2= 6+8=
10+7= 7+5= 8+10= 7+3= 5+8=