math

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What is the value of the following expression...

2-4+6-8+10-12+14-16+...-100

  • math -

    2 + 6 + 14 = 22

    Add the negative numbers and take it from there.

  • math -

    how about writing it like this:

    (2-4) + (6-8) + (10-12) + .... + (98 - 100)
    the value of each bracket is -2 and you have 50 such brackets, so .....

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