Posted by **dell** on Sunday, September 30, 2012 at 2:22pm.

What is the value of the following expression...

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

- math -
**Ms. Sue**, Sunday, September 30, 2012 at 2:34pm
2 + 6 + 14 = 22

Add the negative numbers and take it from there.

- math -
**Reiny**, Sunday, September 30, 2012 at 3:40pm
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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