1/100十2/10099/100等于多少
1/100十2/10099/100等于多少
日期：2022-02-12 21:05:03 人气：1
1/100+2/100+…+99/100
=（1/100+99/100）+（2/100+98/100）+…+（49/100+51/100）+50/100
=1×49+1/2
=49.5
=（1/100+99/100）+（2/100+98/100）+…+（49/100+51/100）+50/100
=1×49+1/2
=49.5