a) 1/3+2/5:6=1/3+2/5*1/6=1/3+1/15=6/15. b) (-1/5)^2-4^2=1/25-16=-399/25. c) {[1,(5)^2-[0,(5)]^2}*9/19=(2,25-0,5)^2*9/19=1,75^2*9/19=27,5625/19. d) (2/3)^3+5/4-9/2=8/27+5/4-9/2=32+135-486totul supra108=319/108. e)36-81:(-4/9)^2=36-81:16/81=36-81*81/16=6085/16. f) (6-8+4)^2+4/3=2^2+4/3=4+4/3=16/3. Exercitiul 2 a) 27/16:9/2-3/4+1/2)^1:4/3=27/16*2/9-3/4+1/2):4/3=(3/8-3/4+1/2)*3/4=(3-6+4totul supra8)*3/4.1/8*3/4=3/32. b). ...=(7/3+9/7+1/4-3/2)^2=49+27totul supra21-5/4)^2=76/21-5/4)^2=(304-105totul supra 84)^2=199/84)^2=