1.125+2.125.+3.125+4.125+5.125+……+50.125=_数学解答

1.125+2.125.+3.125+4.125+5.125+……+50.125=

人气：382 ℃　时间：2020-04-24 07:21:17

解答

1.125+2.125.+3.125+4.125+5.125+……+50.125 =（1+2+3+...+50）+0.125×50 =1275+6.25 =1281.25