te știu perseverent dovedește efectuand calculele

Răspuns:
a) 3,15+(2+3.18)
3,15+5,18=8,33
b) (5+0,17)+(0,109+8,701)=
5,17+8.81=13.98
c) 3,15 +[2+(0,109+1,4)+3,341]=
3.15+(2+1.509+3,341)
3.15+6,85=10