a) 23 - ( - 35 ) = 23 + 35 = 58
b) ( - 145 ) - ( - 254 ) = ( - 145) + 254 = 109
c) \([\left(-3\right)-4]+8=\left(-7\right)+8=1\)
d) 0 - ( - 2 ) + 6 = 2 + 6 = 8
a) 23 - ( -35 ) = 23 + 35 = 58
b) ( -145 ) - ( -254 ) = -145 + 254 = 109
c) [( -3 ) - 4 ] + 8 = -7 + 8 = 1
d) 0 - ( -2 ) + 6 = 0 + 2 + 6 = 8