# 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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