Joke Collection Website - Mood Talk - Can you tell me specifically about the approximate ranges of the set of natural numbers, the set of positive integers, the set of rational numbers, and the set of real numbers?

Can you tell me specifically about the approximate ranges of the set of natural numbers, the set of positive integers, the set of rational numbers, and the set of real numbers?

Natural number set: all integers, excluding decimals and fractions.

Positive integer set: all integers, including negative integers and positive integers.

The set of rational numbers: finite recurring decimals, fractions also count.

Real number set: all numbers, including decimals, integers, fractions, and radicals.

Natural numbers play a big role in daily life, and people use natural numbers extensively. Natural numbers are the earliest numbers that appeared in human history. Natural numbers are widely used in counting and measurement. People also often use natural numbers to label or sort things, such as city bus routes, house numbers, postal codes, etc.

Natural numbers are integers (natural numbers include positive integers and zero), but integers are not all natural numbers. For example: -1 -2 -3... are integers rather than natural numbers. Natural numbers are infinite.

Around 500 AD, with the rise and development of economy, culture and Buddhism, mathematics in the Punjab region in the northwest of the Indian subcontinent has always been in a leading position and originated in India.

The astronomer Ayebhit made a new breakthrough in simplifying numbers: he recorded the numbers in grids. If there is a symbol in the first grid, such as a circle representing 1, point, then the same dot in the second cell represents ten, and the dot in the third cell represents one hundred.

In this way, not only the numerical symbols themselves, but also the order in which they are located also has important meaning. Indian scholars introduced the symbol of zero. It can be said that these symbols and representation methods are the ancestors of today's Arabic numerals.