Răspuns:
Explicație pas cu pas:
[tex]\frac{1}{81}[/tex] : [tex]\frac{4}{9}[/tex] (*4) + [tex]\frac{1}{6}[/tex] (*6)
= 1/81 : 16/36 + 6/36
= [tex]\frac{1}{81} \frac{36}{16} + \frac{6}{36}[/tex]
= 1/9 x 4/16 + 6/36
= 4/144 + 6/36 (x4)
=4+24 / 144
=28/ 144
=7/36
