СРОЧНО. Даю 60 баллов. Пример на фото

1) 9 - 13 2/15 = -( 13 2/15 - 9) = -4 2/15 2) 2 1/15 * (-4 2/15) = -31/15 * 62/15 = -1922/225 3) 2 1/15 - 9 = -(9-2 1/15) = -6 14/15 4) 13 2/15 * (-6 14/15) = -197/15 * 104/15 = -20488/225 5) -1922/225 - 20488/225 = -22410/225 = -1494/15 = -498/5 = -99,6 Ответ: -99,6