Прошу!два примера (а и б)

Смотри,че непонятно спрашивай

A) 1) 3/4 + 1/6 = 9/12 + 2/12 = 11/12 2) 5/6 - 1/2 = 5/6 - 3/6 = 2/6 3) 11/12 x 3 = 11/12 x 3/1 = 11/4 4) 2/6 : 2/9 = 2/6 x 9/2 = 3/2 5) 11/4 + 3/2 = 11/4 + 6/4 = 17/4 = 4 1/4 ------------------------------------------------------- Б) 1) 1 1/5 + 2 3/10 = 3 5/10 = 3 1/2 2) 6 3/4 - 2 2/3 = 4 1/12 3) 3 1/2 : 1/2 = 7/2 x 2/1 = 1/7 = 7 4) 4 1/12 : 1 1/6 = 49/6 x 6/7 = 7/1= 7 5) 7 + 7 = 14