Răspuns:
Explicație pas cu pas:
1.
a.3/9=1/3;
7/9;
24/99=8/33;
375/999=125/333;
b.25/99;
1342/99=122/9;
237/99=79/33;
1105/99;
c.13/99;
433/99;
2375/99;
d.303/9=101/3;
12103/9;
783/9=87;
2.
xy/9+yz/9+zx/9=xyz/9+yzx/9+zxy/9;
xy+yz+zx=xyz+xyz+xyz;
xy+yz+zx=3xyz;