Question

Efectuati scaderile :
a). -1-(-5/7)=
b). (-20/27)-(-5/9)-(+2/3)-(-3)=
c). (-1/6)-(-15/8)-(31/48)-(-13/12)=

Answer 1

a)-1-(-5/7)=-1+5/7=-2/7
b)(-20/27)-(-5/9)-(+2/3)-(-3)=-20/27+5/9(amplifici cu 3)-2/3(amplifici cu 9)+3(amplifici cu 27)=58/27
c)(-1/6)-(-15/8)-(31/48)-(-13/12)=-1/6(amplifici cu 8)+15/8(amplifici cu 6)-31/48+13/12(amplificu cu 4)=119/48