( - 51 ) - ( - 29 ) + 80
= ( - 51 ) + 29 + 80
= - ( 51 - 29 ) + 80
= - 22 + 80
= 80 - 22
= 58
( - 51 ) - ( - 29 ) + 80
= ( - 51 ) + 29 + 80
= - ( 51 - 29 ) + 80
= - 22 + 80
= 80 - 22
=58
( - 51 ) - ( - 29 ) + 80 = ( - 51 ) + 29 + 80
= [ - ( 51 - 29 ) ] + 80
= ( - 22 ) + 80
= ( 80 - 22 )
= 58
(-51)-(-29)+80=(-51)+29+80
=(-51)+109
=58