1.375+2.375+3.375+···+99.375+100.375
来源：学生作业帮助网 编辑：六六作业网 时间：2025/01/31 02:09:28
1.375+2.375+3.375+···+99.375+100.3751.375+2.375+3.375+···+99.375+100.3751.375+2.375+3.375+···+99.375
1.375+2.375+3.375+···+99.375+100.375
1.375+2.375+3.375+···+99.375+100.375
1.375+2.375+3.375+···+99.375+100.375
=1+2+3+.+100+0.375*100=5050+37.5=5087.5
5087.5
(100（1+100）/2)+0.375*100=5087.5
100x0.375+(1+100)x100x0.5=37.5+5050=5087.5
先用1+2+3直到一百得5050再用0.375乘一百得37.5总共得5087.5
1.375+2.375+3.375+···+99.375+100.375
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