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Are positive integers closed under subtraction? •yes •no Are rational numbers closed under multiplication? •yes •no Are negative real numbers closed under division? •yes •no Are irrational numbers closed
72.4k views
2 votes
Are positive integers closed under subtraction?

•yes
•no

Are rational numbers closed under multiplication?
•yes
•no

Are negative real numbers closed under division?
•yes
•no

Are irrational numbers closed under addition?
•yes
•no

User Laurence Billingham
by
8.1k points

2 Answers

4 votes
#1 not closed
#2 closed
#3 not closed
#4 not closed
User Mohammad Hosseini
by
8.2k points
5 votes
Do you remember the answer..? I need help as well.
User Nate Jenson
by
8.3k points
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