Mathematics, 02.06.2020 22:57 yeehaw777

Select from the drop-down menus to correctly identify whether the given operation is closed or not with respect to each set of numbers
1. Real numbers are (closed/not closed) under multiplication
2. Irrational numbers are (closed/not closed) under division
3. Integers are (closed/not closed) under subtraction
4. Positive rational numbers are (closed/not closed) under addition

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