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How much is one plus one plus two plus three plus four plus five all the way up to 100
five zero five zero
How much is one plus one plus two plus three plus one hundred? I'm Xueba. I'll see how you do the Gauss theorem
＜1+100＞×100÷2＝5050
How much is one plus one plus two plus one thousand
1+2+3+.+1000
=(1+1000)*1000/2
=500500
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