Răspuns:pentru a. [(5/9-17/4·2/51)·3/8 +1/6]·16/15=
=[(5/9-1/6)·3/8+1/6]·16/15=
=(5/16-3/16+1/6]·16/15=
=(2/16+1/6)·16/15=
=2/15+8/(3·15)=6/45+8/ 45=14/45
penrtu b. (4/9)-(4/9)^30:[(4/9)^4]^7=
=4/9-(4/9)^30:(4/9)^28=
=4/9-(4/9)²=36/81-16/81=20/81
sper ca te-am ajutat daca vrei poti sa dai si coroana
