101+1001+10001+100001+1000001+10000001+100000001=？

101、one hundred and one1,001、one thousand and one10,001、ten thousand and one100,001、one hundred and one1,000,001、one million and one 10,000,001、ten minllion and one100,000,001、 one hundred and one1,000,000,001 one billion and one 从右往左数,三位三位读如果不明白,请再问;如果对你有所帮助,请点击本页面中的“选为满意回答”按钮,谢谢!

形如10.01中有2n个0,皆能被11整除为11*90..91,其中有90的为n-1个.

(1+100001 )乘7除以2

100001+10001+1001+101+11=100000+1+10000+1+1000+1+100+1+10+1=111110+5=111115

1+(100+1)+(1000+1)+… 首先整体提一个1出来然后里面就是等比数列啊,再用等比数列求和

答案是;21111111111111

1+100+1001+100001+10000001+10000002+20001+3000001-90000=23030107

11*101*10001*100000001=1111111111111111

等于10001.

①原式=9999*(9999+1) =9999*10000 =99990000②原式=10001*(10001-1) =10001*10000 =100010000