巧算1.125+2.125+3.125+4.125+50125+...+50.125

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 04:10:32
巧算1.125+2.125+3.125+4.125+50125+...+50.125巧算1.125+2.125+3.125+4.125+50125+...+50.125巧算1.125+2.125+3.

巧算1.125+2.125+3.125+4.125+50125+...+50.125
巧算1.125+2.125+3.125+4.125+50125+...+50.125

巧算1.125+2.125+3.125+4.125+50125+...+50.125
1+2+3+...+50+50*(0.125)
=(50*51)/2+6.25
=1281.25

你的题目应该是1.125+2.125+3.125+4.125+5.125+...+50.125吧?~
1+2+3+...+50+50*(0.125)
=(50*51)/2+6.25
=1281.25