2.There is a desk in David's classroom.
3.there are 10 chairs in David's classroom.
5.there are no flowers in David's classroom.
7.there are not bookcases in David's classroom.
4.there is a map in David's classroom.
6.there are no clocks in David's classroom.
8.there is some lamps in David's classroom.
число аб можно записать как 10а+б, а число ба можно записать как 10б+ а
Тогда, (10а+б)+(10б+а) = 11а+11б= 11(а+б)
ну, а 11(а +б) всегда кратно(а+б)
Today that day
now just nkw that day
last week the previous week
yesterday the previous week
two days ago two days before
this book that book
Ninting and ninty six. Найнтинг` энд найнти сикс