Question

Efectuati :1/3+1/6,2/5+3/10,2/3+4/1,2/7+5/21 va rogg

Answer 1

1/9
5/15=1/3
6/4
7/28   efectuati

Answer 2

1/3(amplifici cu 2)+1/6= 2/6+1/6= (2+1)/6=3/6=1/2.
2/5(amplifici cu 2)+3/10= 4/10+3/10=(4+3)/10=9/10
2/3+4/1(amplifici cu 3)=2/3+12/3 =(2+12)/3=14/3
2/7(amplifici cu 3)+5/21= 6/21+5/21=(6+5)/21=11/21