计算: 1/1×5+1/5×9+1/9×13+1/13×17+1/17×21+1/21×25 456+979×455/456×979—523求详细过程,按照公式做,谢谢!

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/24 06:10:57
计算: 1/1×5+1/5×9+1/9×13+1/13×17+1/17×21+1/21×25 456+979×455/456×979—523求详细过程,按照公式做,谢谢!
x){nu`oxx=݆[Y@9i~x!ibd`bjZ@-5L152~ew|Eγ˟yi,MR>\X' `t5k1Җ 2uA@,# hc&(F <3 E;P>D)Pi+Ն+WЄ*ƭ(Udh_\gN0{:Fd]

计算: 1/1×5+1/5×9+1/9×13+1/13×17+1/17×21+1/21×25 456+979×455/456×979—523求详细过程,按照公式做,谢谢!
计算: 1/1×5+1/5×9+1/9×13+1/13×17+1/17×21+1/21×25 456+979×455/456×979—523
求详细过程,按照公式做,谢谢!

计算: 1/1×5+1/5×9+1/9×13+1/13×17+1/17×21+1/21×25 456+979×455/456×979—523求详细过程,按照公式做,谢谢!
1/1×5+1/5×9+1/9×13+1/13×17+1/17×21+1/21×25
=(1-1/5+1/5-1/9+1/9-1/13+1/13-1/17+1/17-1/21+1/12-1/25)÷4
=(1-1/25)÷4
=24/25÷4
=6/25
(456+979×455)/(456×979—523)
=( 456+979×455)/(455×979+979—523 )
=(456+979×455)/(455×979+456)
=1

正确啊!!!!!