By the middle on the 2nd millennium BC, Babylonian mathematics had a sophisticated base 60 positional numeral method. The shortage of the positional worth (or zero) was indicated by a space involving sexagesimal numerals. Hãy tận dụng các dịch vụ mà DHL cung cấp để việc gửi hàng của bạn https://matthewr145qst0.blog-a-story.com/profile