
did you read anything I wrote down?...try reading it again maybe you'll understand it
"Eight years after the Nine-Tails' attack, Tobi infiltrated Konoha to try to rekindle the flames of war. He was found by Itachi Uchiha first, who convinced Tobi to spare the village in exchange for helping to wipe out the Uchiha clan for deserting him decades earlier. Tobi complied, training Itachi and providing assistance."
if you add up the years it works
for Itachi:
4 (years old)+8 (years after the fox attack)=12(his age then)
13(how old he was when he killed his clan) + 4(when he met back up with sasuke)=17
for sasuke:
17(itachi in part 1)-13(sasuke in part 1)= 4(how many years older itachi is)
13(when itachi killed his can) -4(how many years older itachi is)= 9(how old sasuke had to be when his clan died)
9(sasuke younger) + 4(when they met back up)= 13(sasukes age in part 1)
itachi was 4 when sasuke was born
itachi was 12 when he met up with madara and sasuke was 8
itachi was 13 when he killed his clan and sasuke was 9
Itachi was 13 when he fought Oro because it also say that as soon as he joind he fought him
itachi was 17 in part 1 and sasuke was 13