Numbers 0-9

The numbers 0 to 9 are the ten digits used to write numbers in the decimal system, the system used in everyday life in most countries. Each digit represents a value: 0 means no units, while 1 through 9 represent increasing quantities. By combining these digits and placing them in different positions, we can write much larger numbers.

For example, 27 is made from the digits 2 and 7, but their positions give them different values: 2 represents two tens, while 7 represents seven ones. The position of a digit is therefore important. The digit 5 in 5, 50, and 500 represents different quantities even though the written digit is the same. Zero has a special role in our number system.

It can represent an empty quantity, but it can also act as a placeholder that shows the position of another digit, as in 204. The digits 0 to 9 are also used to write decimals, such as 3.5, and to represent measurements, prices, dates, and many other kinds of information. Learning to recognize, name, order, and compare these digits is an important step in early mathematics.

Children can practise by counting objects, matching quantities with written digits, arranging digits from smallest to largest, and forming different numbers. It is useful to distinguish a digit from a number: a digit is one of the symbols from 0 to 9, while a number can contain one or several digits. Understanding this difference helps children build a strong foundation for counting, calculating, and working with larger numbers.