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OpenStudy (anonymous):
Which sets of numbers are closed under addition? Choose all answers that are correct. whole numbers natural numbers negative integers integers
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OpenStudy (anonymous):
will medal and fan
OpenStudy (elonasushchik):
It's all above. Is there a choice like that?
OpenStudy (anonymous):
@igreen can u help me
OpenStudy (anonymous):
@AndrewTheCookie
OpenStudy (elonasushchik):
It says choose answers that are ALL correct. It's A through D
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