Răspuns:
1. 1si5/6;4si 2/3;1si 3/8;2 si6/7;6 si1/2;1 și 1/14;2 și 3/20
2. 13/4; 18 /7; 6/5; 35/8; 47/5; 81/11.
3. a) 25 /23 ;23 /23 ;19/ 23 ;15 /23 ;7 /23 ;1/23 .
b)7/2; 7/3; 7/5; 7/10; 7/14
4.a) 3/4=3×3/3×4=3/4 b)1/3 diferit de1/4
C )11/7=3×11/3×7=11/7
5)(4/1; 4/2; 4/3;)supraunitare
4/4;
(4/5; 4/6; 4/7; 4/8; 4/9. subunitare
6)a) 8/7; 9/7 ;10/7; 11/7; 12/7.
b)5/6; 5/7; 5/8; 5/9.
c)x=3=>36/36
