Răspuns:
a) 4.5 *( 7+ 3.6*3.6 : 0,3*0,3) + 1,6: 3,2= 4.5 *( 7+ 12*12) + 0,5=
4.5*( 7+144)+ 0,5= 4.5* 151= 679,5 +0.5= 680
b) 10065:5= 2013 daca avem acelasi numitor putem scrie
[tex]\frac{5(1+2+3+...+2012+2013)}{4026}[/tex] = [tex]\frac{5*2013*1007}{2*2013}[/tex] = 5*1007:2= 5035:2= 2517,5
1+2+...+2013= 2013*2014:2= 2013*1007
