1
a=(2,7-0,95)×4+2,35=1,75×4+2,35=7+2,35=9,35
2
b=(5,34+10,87):0,01-44,5=16,21:0,01-44,5=1621-44,5=1576,5
3
ma=(a+b)/2=(9,35+1576,5)/2=1585,85/2=792,925
4
a+b=20,3
b+c=23,14
a+2b+c=a+b+b+c=20,3+23,14=43,44
5
986 este cel mai mare nr de 3 cifre distincte divizibil cu 2
6. p=pret pix
s=pret stilou
c=pret caiet
p+s=5
s+c=7
p+c=6
p+s+s+c+p+c=5+7+6
2(p+s+c)=18
p+s+c=9
c=9-5=4 lei caietul
p=9-7=2 lei pix
s=9-6=3 lei stilou
