(8+8/9)+(-9+1/3)
(8 + 8/9) + (–9 + 1/3)
8 + 8/9 – 9 + 1/3 =
8 + 8/9 – 9 + 3/9 =
8 – 9 + 8/9 + 3/9 =
–1 + 11/9 =
–1 + 12/9 = 2/9
.