He is good at elementary arithmetic, and can solve calculation problems quickly.

The British Antarctic Territory occupies a part of the Antarctic continent.

The British Indian Ocean Territory is a region managed by the UK.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.

The history of the Empire of Japan is very interesting.

He said he couldn't agree with the views of the revisionists.

In linear algebra, the upper triangular matrix plays a very important role.

The grammar of 'Jou-nidan' is an important part in learning Japanese.

My room is on the upper level.

Colonialism continued for a long time until many countries achieved independence.