Question

3/4 + 1 1/4
1/3 + 1/6
1/3 x 3

Answer 1

....................se sabe

*a/b + c/d =(da + bc)/bd

*a/b + c/b =(a + c)/b

*(a/b)c = (ac)/b

...........................del problema

3/4 + 1 1/4 =(3+11)/4 =14/4

1/3 + 1/6  = (6*1+3*1)/3*6 =(6+3)/18 =1/2

1/3 x 3 =3/3 =1