1. 5/12+7/10=(5*5+7*6)/60=(25+42)/60=67/60
2. 1,3+2,(5)= 13/10+(25-2)/9=13/10+23/9=(13*9+23*10)/90=(117+230)/90=
=347/90 =3,8(5)
3. 2:(2/3)² +11/5 : 11/10=
=2x(3/2)² +11/5 × 10/11 =
= 9/2+2=(9+4)/2=13/2=6,5
4. -3,4<-3,44<-3,5
-3,4<-3,46<-3,5
5. (-1/2)⁴ *(1/2)³ *(-1/2)⁻⁶ =
=1/2⁷ * (- 2)⁶ =1/2
6
fractie echiunitara numitor=numarator
5=n-3
n=8
