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anonymous

  • one year ago

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

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  1. anonymous
    • one year ago
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    @Michele_Laino

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    • one year ago
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  4. anonymous
    • one year ago
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    @Sup???

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    • one year ago
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    • one year ago
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    • one year ago
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  14. amistre64
    • one year ago
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    what does it mean to be 'closed' ?

  15. anonymous
    • one year ago
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    idk what they mean by closed under addition

  16. amistre64
    • one year ago
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    google the phrase: "closed under addition" and you should get a rough idea, or at least a basis to work from.

  17. anonymous
    • one year ago
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    ok

  18. amistre64
    • one year ago
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    consider 'closure' like being locked in a room .. nothing can get in or out. the only thing we have to work with, is what is in the room with us. now we are told that all we have to work with, is whole numbers, and addition. if thats all we have to work with, then that is all that can appear in our work.

  19. amistre64
    • one year ago
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    which options only have whole numbers, and addition to work with?

  20. anonymous
    • one year ago
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    b

  21. anonymous
    • one year ago
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    am i right

  22. amistre64
    • one year ago
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    B is good, and one more

  23. anonymous
    • one year ago
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    a

  24. amistre64
    • one year ago
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    1,1,2 are all whole numbers, and + is addition, B works great

  25. amistre64
    • one year ago
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    is -1 a whole number?

  26. anonymous
    • one year ago
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    d

  27. amistre64
    • one year ago
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    is -1 a whole number?

  28. anonymous
    • one year ago
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    am i right

  29. amistre64
    • one year ago
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    you havent answered my question

  30. anonymous
    • one year ago
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    yes it is

  31. amistre64
    • one year ago
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    ok, so you dont know what a whole number is, there is another point of study for you.

  32. amistre64
    • one year ago
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    look up the set of whole numbers, and define it for me

  33. anonymous
    • one year ago
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    So in this case, closure under addition means for all . This set isn't closed under addition; consider . Closure under multiplication in this case means for all . This set is closed under multiplication; simply write out all possible products of elements

  34. anonymous
    • one year ago
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    In mathematics, the natural numbers (sometimes called the whole numbers) are those used for counting (as in "there are six coins on the table") and ordering (as in "this is the third largest city in the country").

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