Question

Помогите пожалуйста,номер 291

Answer 1

30/3=10
1/3=1*10/(3*10)=10/30
2/3=2*10/(3*10)=20/30
30/5=6
1/5=1*6/(5*6)=6/30
2/5=2*6/(5*6)=12/30
4/5=4*6/(5*6)=24/30
30/6=5
1/6=1*5/(6*5)=5/30
5/6=5*5/(5*6)=25/30
30/10=3
3/10=3*3/(10*3)=9/30
7/10=7*3/(10*3)=31/30
9/10=9*3/(10*3)=27/30