Question

Номер 81 всё, зарание спасибо

Answer 1

1)(13/2)*(2/15)=26/45
2)(36/7)*(3/19)=108/113
3)(32/5)*(5/36)=32/36=8/9
4)(31/8)*(8/21)=31/21
5)21/2*4=42
6)81/4*3=243/4
7)(63/4)*(1/5)=63/20
8)(81/5)*(1/2)=81/10