Răspuns:
Ex 2
40% din 50 = 20
Ex 3
-2+(-1)+0+1+2+3= - 3+1+2+3= 3
Ex 4
[tex] \frac{14}{21} sunt \: divizibili \: cu \: 7(se \: impart \: la \: sapte) = \frac{14}{21} \div 7 = \frac{2}{3} [/tex]
Ex 5
B) A ={-2,-1,0,1,}
Ex 6
100%= andrei+dana+vali+sanda
Dana = (100%-andrei-vali)-sanda
Dana = (100%-15%-25%)-35%
Dana = 85%-25%-35%
Dana = 60%-35%
Dana = 25%
C) 25%
