254 - 49 - 75 + 254 - 175 + 549

= ( 549 - 49 ) - ( 175 + 75 ) + 254 + 254

= 500 - 250 + 254 + 254

= 758

l) −81−132−547+181−132−53 

= −213−547−181−132−53

= −760−181−132−53

= −941−132−53

= −1073−53

= −1126

m) 50−2016+50−118+2016−18

= −1966+50−118+2016−18

= −1916−118+2016−18

= −2034+2016−18

= −18−18

= −36

n) 254−49−75+254−175+549

= 205−75+254−175+549

= 130+254−175+549

= 384−175+549

= 209+549

= 758

p) 173−536+173−[29−29+526]

= 173−536+173−526

= −363+173−526

= −190−526

= −716

q) −[−171+171+223]−[172−105+172]+223

= −223−(172−105+172)+223

= −223−(67+172)+223

= −223−239+223

= −462+223

= −239