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