He solved a large number of problems.

He lived in Japan for 10 years.

He is a fourth grader.

I wonder what kind of year this will be.

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.

My electronic dictionary is very convenient.

When learning Japanese, it is important to remember words in dictionary form.

He is a second-year high school student.