Подскажите как с дробями буду благодарна за подробный ответ Только буквы A и B

А)

((2 1/3 - 1 7/9) : 30/49) + 11 5/6 = 12 20/27,

1) 2 1/3 - 1 7/9 = 2 3/9 - 1 7/9 = 1 12/9 - 1 7/9 = 5/9,

2) 5/9 : 30/49 = 5/9 * 49/30 = 49/54,

3) 49/54 + 11 5/6 = 49/54 + 11 45/54 = 11 94/54 = 12 40/54 = 12 20/27

В)

2 3/11 * 7/9 + 6 8/11 : 1 2/7 - 1 16/99 = 5 83/99,

1) 2 3/11 * 7/9 = 25/11 * 7/9 = 175/99 = 1 76/99,

2) 6 8/11 : 1 2/7 = 74/11 : 9/7 = 74/11 * 7/9 = 518/99 = 5 23/99,

3) 1 76/99 + 5 23/99 - 1 16/99 = (1 + 5 - 1) + (76/99 + 23/99 - 16/99) =

    = 5 + (83/99) = 5 83/99

А)

((2 1/3 - 1 7/9) : 30/49) + 11 5/6 = 12 20/27,

1) 2 1/3 - 1 7/9 = 2 3/9 - 1 7/9 = 1 12/9 - 1 7/9 = 5/9,

2) 5/9 : 30/49 = 5/9 * 49/30 = 49/54,

3) 49/54 + 11 5/6 = 49/54 + 11 45/54 = 11 94/54 = 12 40/54 = 12 20/27

В)

2 3/11 * 7/9 + 6 8/11 : 1 2/7 - 1 16/99 = 5 83/99,

1) 2 3/11 * 7/9 = 25/11 * 7/9 = 175/99 = 1 76/99,

2) 6 8/11 : 1 2/7 = 74/11 : 9/7 = 74/11 * 7/9 = 518/99 = 5 23/99,

3) 1 76/99 + 5 23/99 - 1 16/99 = (1 + 5 - 1) + (76/99 + 23/99 - 16/99) =

    = 5 + (83/99) = 5 83/99