number notation; numeric representation
Refers to the way numbers are written or expressed, such as using digits, words, or symbols.
On this document, please write the date using numeric notation.
There are two types of number notation: Arabic numerals and Chinese numerals.
表記 is a broader term for 'notation' or 'representation' in general, while 数字表記 specifically refers to the notation of numbers.
数字 means 'numeral' or 'digit', whereas 数字表記 refers to the system or method of writing numbers.
Compound of 数字 (number, digit) and 表記 (notation, representation).