Вынесем за скобку 2 (основание системы счисления): 1101(2) =(1*2^2 +1*2^1)*2^1:+ 1.

1.I will spend this vacation in the countryside.2.This man seemed funny.3.Now I'll go for a walk with a friend.4My neighbor turned out to be a rich man.5.How much does that cost?6.My sister is very clever.7.I bought not only a notebook but also pen.8.My cat is gray