He lived in Japan for 10 years.

He is a fourth grader.

I wonder what kind of year this will be.

He solved a large number of problems.

Understanding numbers is important for solving math problems.

He was bedridden with illness for several days.

I can't solve this problem because there are too many numbers.

This book is a thousand yen.

Mr./Ms. Sen is my best friend.

There are a thousand meters from my house to school.