a)39-51:[1+2×(24×25-599)]= 39-51:[1+2×(600-599)]= 39-51:(1+2×1)= 39-51:3= 39-17=22elevi la bunici b)15+[34×(598-568)-(671+349)= 15+(34×30-1020)= 15+(1020-1020)= 15+0=15elevi la munte c)25×[208-(707-568)]-28×61-6= 25×(208-139)-28×61-6= 25×69-28×61-6= 1725-1708-6= 17-6=11elevi la mare