URGENT!!!a și b. Dau 40 de puncte!!!Ambele!!!

0,6·1 1/9 - 7/9 : (2 - 1/4) =
= 6/10·10/9 - 7/9 : [(8-1)/4]
= 6/9 - 7/9·4/7
= 6/9 - 4/9
= 2/9
(3 8/9 - 1,5) : (3 1/2 + 0,8) + 2,(4) =
= (35/9 - 15/10) : (7/2 + 8/10) + 22/9
= [(350 - 135)/90] : (7/2 + 4/5) + 22/9
= (215/90) : [(35 + 8)/10] + 22/9
= 215/90·10/43 + 22/9
= 5/9 + 22/9
= 27/9
= 3