ответ: -19,25 = -19 1/4
Объяснение: (-10 3/4) + (-6 5/6) + (-1 2/3) =
= -10 3/4 - 6 5/6 - 1 2/3 =
= -10 9/12 - 6 10/12 - 1 8/12 =
= -17 27/12 = -19 3/12 = -19,25
ответ: -19,25 = -19 1/4
Объяснение: (-10 3/4) + (-6 5/6) + (-1 2/3) =
= -10 3/4 - 6 5/6 - 1 2/3 =
= -10 9/12 - 6 10/12 - 1 8/12 =
= -17 27/12 = -19 3/12 = -19,25