what  is the sum of the first 10 whole number?

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  • David
    Lv 7
    4 weeks ago

    It is 45 if you're including 0 as a whole number

  • 4 weeks ago

    0 + 1 + 2 + ... + 8 + 9 = 45

  • 4 weeks ago

    When I learned about the number systems, the whole numbers were {0, 1, 2, 3, ...}, also called "the non-negative integers".  If that's the definition used in your class then the sum is:

        0 + 1 + 2 + ... + 8 + 9 = 45

    You can save time by rearranging the sum:

       = 0 + 9 + 1 + 8 + 2 + 7 + 3 + 6 + 4 + 5

       =    9     +   9    +     9    +   9     +    9

    ...where I've added numbers in pairs.  That's clearly 5*9 = 45.

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