Salut!
Rezolvare :
2. [(0,2)²×(0,3)²+4,87]×0,12÷0,3=
(0,04×0,09+4,87)×0,12÷0,3=
(0,0036+4,87)×0,12÷0,3=
4,8736×0,12÷0,3=
4,8736×0,04=0,194944
————
3. 5,18+43,2=48,38
48,38÷2=24,19
————
4. [(0,4)²+5,64]÷[(6,5)²-42,05]=
(0,016+5,64)÷(42,25-42,05)=
5,656÷0,2=28.28