SOLUTION: What is the value of 1 − 2 + 3 − 4 + ... + 99 − 100 (alternating signs for each term)?

SOLUTION: What is the value of 1 − 2 + 3 − 4 + ... + 99 − 100 (alternating signs for each term)?

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Question 258317: What is the value of 1 − 2 + 3 − 4 + ... + 99 − 100 (alternating signs for each term)?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

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You have 50 pairs of differences each of which equals (-1).
Sum=.
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