b, 25 + ( -8 ) + ( -25 ) + ( -2 )
= 25 - 8 - 25 - 2
= ( 25 - 25 ) - ( 8 + 2 )
= 0 - 10
= -10
d, ( -9 ) + 301 + ( -511 ) + 119
= -9 + 301 - 511 + 119
= ( 301 + 119 ) - ( 9 + 511 )
= 420 - 520
= -100
e, 455 + ( -311 ) + 3789 + ( -144 )
= 455 - 311 + 3789 - 144
= 455 - ( 311 + 144 ) + 3789
= 455 - 455 + 3789
= 0 + 3789
= 3789
f, ( -4 ) + ( -440 ) + ( -6 ) + 400
= -4 - 440 - 6 + 400
= ( 400 - 400 ) - ( 4 + 6 )
= 0 - 10
= -10
i, -2005 + ( -596 ) + ( -201 ) + 496 + 301
= -2005 - 596 - 201 + 496 + 301
= ( 301 - 201 ) + ( 496 - 596 ) - 2005
= 100 + ( -100 ) - 2005
= 100 - 100 - 2005
= 0 - 2005
= -2005