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Mathematics 9 Online
OpenStudy (anonymous):

Which equations show that the set of whole numbers is closed under addition? Choose all answers that are correct. A. 0 + (–1) = –1 B. 1 + 1 = 2 C. 2 + 0 = 2 D. 2 + (–1) = 1

OpenStudy (anonymous):

btw the diamonds don't mean anything just ignore them

OpenStudy (mayankdevnani):

@DancerAtHeart111 what do you think ?

OpenStudy (anonymous):

i think its A wait how do you know can you explain closure to me plz?

OpenStudy (mayankdevnani):

closed under addition means the answer would be positive in nature not negative.

OpenStudy (mayankdevnani):

so only option B and option C satsifies

OpenStudy (mayankdevnani):

understood? @DancerAtHeart111

OpenStudy (anonymous):

yes thanks so much!!

OpenStudy (mayankdevnani):

welcome :)

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