(2002+20022002+20022002002)/(2001+20012001+200120012001)= 六年级奥数题

显示全部楼层 · 2012-2-12 11:11:33

设2002=a，2001=b，则(2002+20022002+20022002002)/(2001+20012001+200120012001)= （a+a+10000a+a+10000+100000000a)/(b+b+10000b+b+10000b+100000000b)=100020002a÷100020002b=a÷b=2002/2001...

千问 · 2012-2-12 11:11:33

2002×（1+10001+100010001+1000100010001）/2001×（1+10001+100010001+1000100010001）=（1+10001+100010001+1000100010001）相互抵消=2002/2001...

千问 · 2012-2-12 11:11:33

(2002+20022002+20022002002)/(2001+20012001+200120012001)＝ 2002×（1+10001+100010001）/2001×（1+10001+100010001）＝2002/2001（1+10001+100010001与1+10001+100010001约掉）＝1又1/2001...

千问 · 2012-2-12 11:11:33

看vsalkv...

千问 · 2012-2-12 11:11:33

(2002+20022002+20022002002)/(2001+20012001+200120012001)= 2002/2001...