Răspuns :
a)-61-(-15-100) = -61+115= 54
b)12+3-(5+22)= 15 -27= -12
c)-2-143+[27-(-17-49)] = - 145+(27+66)= -145+ 93= -52
b)12+3-(5+22)= 15 -27= -12
c)-2-143+[27-(-17-49)] = - 145+(27+66)= -145+ 93= -52