6) impartirea fractiilor se face prin inmultirea primei fractii cu inversa celei de-a doua .
b)-3/5:(-9/5)=-3/5x(-5/9)= simplificam
=1/3
d)1 1/5:6/5=6/5x5/6=1
e)-3/7:1=-3/7x1=-3/7
g)121/3x(-1/7)x42/11 la2=
121/3x(-1/7)x42/121= simplificam
=-6/3=-2
7)
b)1,20:(-2)=120/100X(-1/2)=12/10X(-1/2)=-6/10=-3/5
m)1,(4):-13/2=14-1 totul pe 9x(-2/13)=13/9x(-2/13)=-2/9
8)
b)-4/3/5x15=-4/3x1/5x15=-4
9)
a)(1/2+3/95+4/37):(-1/2-3/95-4/37)=
(1/2+3/95+4/37)x1/(-1/2-3/95-4/37)=-1
10)
a)1/12+1/3x5/6=1/12+5/18=numitor comun 36
prima amplificam cu 3 a doua cu 2
(3+10)/36=13/36
b)5/6-5/6x2=5/6-5/3=
5-10 totul pe 6=-5/6