Why do Koreans use English words when they are doing math in their math classes?

I overheard a math class the other day use words like "x minus y" and other formulations and was wondering about this. When I asked my co-teacher about this, he said "it just is."

Any shedding of light on this curiosity of mine would be much appreciated. Google doesn't help me.

Thanks,

T

I overheard a math class the other day use words like "x minus y" and other formulations and was wondering about this. When I asked my co-teacher about this, he said "it just is."

Any shedding of light on this curiosity of mine would be much appreciated. Google doesn't help me.

Thanks,

T