六年级奥数题49+1/49-1+81+1/81-1+121+1/121-1+.9800+1-9800-1等于多少
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 08:03:44
![六年级奥数题49+1/49-1+81+1/81-1+121+1/121-1+.9800+1-9800-1等于多少](/uploads/image/z/61716-12-6.jpg?t=%E5%85%AD%E5%B9%B4%E7%BA%A7%E5%A5%A5%E6%95%B0%E9%A2%9849%2B1%2F49-1%2B81%2B1%2F81-1%2B121%2B1%2F121-1%2B.9800%2B1-9800-1%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91)
xJ@_g7C;ihv!]$xڋAbTO#S_&VRЃ,nm.ezNᮌĮ9S`H\HĊ<{\JΛ}u>9s{k7t£W戩p,Ԑ>. Q|GmSvw=a@߮gC<]Oʍq;oOQ!`
@'*Щ`I;+Z0}T5ʪә8AbC/d߀
六年级奥数题49+1/49-1+81+1/81-1+121+1/121-1+.9800+1-9800-1等于多少
六年级奥数题49+1/49-1+81+1/81-1+121+1/121-1+.9800+1-9800-1等于多少
六年级奥数题49+1/49-1+81+1/81-1+121+1/121-1+.9800+1-9800-1等于多少
49+1/49-1+81+1/81-1+121+1/121-1+.9801+1/-9801-1
=1+2/6*8+1+2/8*10+1+2/10*12+……+1+1/98*100
=47+(1/6-1/8+1/8-1/10+1/10-1/12+……+1/98-1/100)
=47+(1/6-1/100)
=47又47/300
0
10
(49+1)/(49-1)+(81+1)/(81-1)+(121+1)/(121-1)+....(9801+1)/(9801-1)
=1+2/(6*8)+1+2/(8*10)+1+2/(10*12)+...+1+1/(98*100)
=93+(1/6-1/8+1/8-1/10+1/10-1/12+...+1/98-1/100)
=93+(1/6-1/100)
=27947/300