11 + 9 =( ) ( )- 15=4 13 -( )= 0 11 + 7 =( ) ( )+ 4 = 15 15 -( )=4 9 +( )= 15 ( )- 12 = 8 1 + 13 =( ) 17 -( )= 2 ( )+13 = 19 7 + 5=( ) 8 +( )= 9 ( )+ 6 = 18 12 + 6 =( )
( )+ 6 = 18 18 -( )=5 6 + 14=( ) 11 + 8 =( ) 12 -( )= 1 ( )+ 5 = 17 7 + 14=( ) ( )+ 3 = 19 11+ 3 =( )( )+ 5 = 18 13 -( )=10 ( )+ 7 = 12 15 -( )= 1 7 +( )= 5 ( )- 15= 2
( )+ 7 = 10 12 +( )=18 11 + 13=( ) ( )+ 1 = 18 9 +( )= 17 ( )- 11=10 5+( )= 13 ( )- 13 = 0 2 +( )= 15
( )- 18= 0 12 + 5 =( ) ( )+ 12 = 10 15 +( )= 20 ( )+ 5 = 7( )+ 2 = 15
1 + 12=( ) 6 -( )= 3 7 +( )= 11 ( )+ 7 = 11 5 -( )= 2 2 + 12=( ) 10 -( )= 8 1 + 4 =( ) ( )+ 0 = 8 2 +( )= 10 ( )+ 7 = 10 2 +( )= 8 ( )- 9=7 16 +( )= 8 ( )- 17 = 2
( )- 12 = 1 15 -( )= 0 ( )- 12 =2 1 + 12 =( )( )- 18 = 6 17 +( )= 10 ( )- 18=5 17 -( )= 2 ( )- 15= 1 5 +( )= 10 ( )- 16 = 3 11 +( )= 18 ( )- 12= 2 5 + 11=( )( )- 8 = 16
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