וַיִּֽהְיוּ֙ כָּל־יְמֵי־נֹ֔חַ תְּשַׁ֤ע מֵאוֹת֙ שָׁנָ֔ה וַחֲמִשִּׁ֖ים שָׁנָ֑ה וַיָּמֹֽת׃ (פ)
Всех же дней Ноевых было девятьсот пятьдесят лет; и он умер.
Or HaChaim
ויהיו כל ימי אדם. The total lifespan of Adam comprised, etc. There is a reason why the Torah describes the lifespan of Adam in general as well as in specific terms i.e. כל ימי אשר חי. We have to remember that the lifespan of every human being is determined prior to his birth. This rule did not apply to Adam when he was created as he would have lived forever had he not sinned.. The line ויהיו כל ימי אדם אשר חי tells us that his lifespan was determined only while he was already alive. When the Torah does employ the words ויהיו כל ימי פלוני this means that all the people mentioned lived out the full lifespan allocated to them at birth. The Torah did not intend to teach us arithmetic by giving us totals when it had already given us the number of years the respective person lived before fathering a son and the years he lived subsequently.