1)
(7,5+8+9+8,5+7+10+10+9+8+9+8,5+9)/12=8,625
2)
a) (9/5)/3=9/15=3/5
b) (5/3)x3=5
3)
(4x1+10x1,5)/14=(4+15)/14=19/14 lei
4)
a) 1,(3)=(13-1)/9=12/9=4/3
3 si 1/3=(3x3+1)/3=10/3
[3x(4/3)+6x(10/3)]/9=(4+20)/9=24/9=8/3
b)1,3(8)=(138-13)/90=125/90=25/18
0,(3)=3/9=1/3
[1x(1/2) +9x(25/18) +6x(1/3)]/(1+9+6)=(1/2 +25/2 +2)/16=15/16
5)
a) (3x2+8x3)/(3+8)=(6+24)/11=30/11
b) (4x1/2 +6x1/3)/(4+6)=(2+2)/10=2/5
c) (4x3/20 +2x1/5 + 3x1 +5x3)/(4+2+3+5)=(3/5 +2/5 +3+15)/14=19/14
6) Pe asta il faci tu ca sa vezi daca ai inteles!!!
