Question

calcule as expressões : a) -8+(-5)-(-4)+(18-20) ; b) -(-5+8-3+12)-(25-4+11-10)

Answer 1

a) -8-5+4-2= -13+4-3= -9-2= -11
b) 5-8+3-12-(25-4+11-10) = -3+3-12-(25-4+11-10)= -12-25+4-11+10= -37+4-11+10= -33-11+10= -44+10= -34