Как изменится четырёхзначное число, если количество единиц в разряде сотен увеличить на одну, а количество единиц в разряде тысяч уменьшить на одну?

напишите предложения в косвенной речи!1. They said: "We have forgotten to phone our friend".
2. "I'm going to the cinema straight from work. Will you go with me?" Barry said to Ann.
3. "What will you be doing at ten o'clock on Friday?" asked Ben. "I think I will be having breakfast", said Mike.
4. The man asked us: "Is there a post office near here?"
5. "Where is my magazine, Alice?" asked mother. "I have put it on the table", said Alice.
6. "I won't do it until they give me some money", said the boy.
7. "Don't smoke in the compartment", said the passenger.

заранее спасибо!