神经断了怎么办:110+112+114+````+1996+1998+200等于多少啊?
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110+112+114+````+1996+1998+2000
=(110+2000)*[(2000-110)/2+1]/2
=2110*946/2
=998030
2000吧?998030
998030
(2+2000)*2000/4-(2+108)*108/4
110+112+114+````+1996+1998+2000
=(110+2000)*[(2000-110)/2+1]/2
=2110*[(1890/2+1)/2]
=2110*[945+1]/2
=2110*473
=998030