Помогите ! 1/7+3/14= 1/7:3/14= 1/7-3/14= 1/7•3/14=
1/7+3/14=2/14+3/14=5/14 1/7:3/14= 1/7* 14/3=2/3 1/7-3/14=2/14-3/14= - 1/14 1/7•3/14=3/98