I.1. a)0,2=2/10 se simplifica prin 2 =>1/5
b)[tex]\sqrt{27}-\sqrt{12} =\sqrt{15}[/tex] si ramane asa(am introdus 2-ul sub radical)
c) 5
2. a) [tex]2-2\sqrt{2}+1 +2\sqrt{2}[/tex]=3
b) 2x-1`
c) Se da factor comun x si ramane (x+1)/3
3. a) 16/2=8
c) 4
4.b)ab, a'b', c'd'
c)a'b'
