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Which one is more grammatical, “5 of them are 0” or “5 of them are 0s”?

this question comes from this post. In this specific case, the Σ contains six given values, and 5 of them are 0 in this context, which one is more grammatical, "5 of them are 0" or "5 of them ...
7
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5answers
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Arithmetic expressions: singular or plural?

Five and two make/makes seven. Five times two is/are ten. Five minus two leave/leaves three. Which ones are correct? Could someone explain the logic behind them?
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Exist vs exists in mathematics

Are there any rules about when to say exist and when to say exists in mathematics? For example, both these sentences appear in a book of mine: There exist αi in I such that xn = Σ αi xi. There ...