Question

A skyscraper has 26568 windows. In one month, a team of window cleaners clean 15365 of them. How many windows still need to be cleaned?

Answer 1

`26568` `-` `15365` `=` `11203`

Explanation:

When a skyscraper has `26568` windows, and only `15365` are clean, that means there are `26568` `-` `15365` unclean windows.

`26568` is the number of windows.

`15365` is the number of cleaned windows.

`26568` `-` `15365` `=` `11203`

There are `11203` unclean windows because only `15365` are clean.

`11203` `+` `15365` `=` `26568`