Номер 1075
1) 3 1/2 + (–7 2/3 + 5 1/6) = 3 1/2 + (–(7 2/3 – 5 1/6)) = 3 1/2 + (–(7 4/6 - 5 1/6) = 3 1/2 + (–2 1/2) = 1
2) (–12,42 + 13,67) + (–2 1/5) = (13,67 – 12,42) + (–2,2) = 1,25 + (–2,2) = –(2,2 – 1,25) = –0,95
1) 3 1/2 + (–7 2/3 + 5 1/6) = 3 1/2 + (–(7 2/3 – 5 1/6)) = 3 1/2 + (–(7 4/6 - 5 1/6) = 3 1/2 + (–2 1/2) = 1
2) (–12,42 + 13,67) + (–2 1/5) = (13,67 – 12,42) + (–2,2) = 1,25 + (–2,2) = –(2,2 – 1,25) = –0,95