A mathematician who specializes in arithmetic.

A person skilled in performing calculations.

गणना करने में कुशल व्यक्ति।

English Usage: As an arithmetician, she could quickly add long strings of numbers.

Hindi Usage: एक अंकगणितज्ञ के रूप में, वह लंबे संख्याओं का जोड़ जल्दी कर सकती थी।