Okay kiddo, do you know how we count numbers? Like 1, 2, 3, and so on? Well, there are different ways to do it. One way is called Hindu-Arabic numerals.
Hindu-Arabic numerals are a way of writing numbers that use ten different symbols called digits. Those symbols are 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
These digits were first used by people in India many years ago. Then, they were brought to Europe by Arab traders and became very popular there. That's why they're called Hindu-Arabic numerals.
Using these numerals, we can write any number we want, no matter how big or how small. For example, we can write the number 123456 by using the symbols 1, 2, 3, 4, 5, and 6 in the correct order.
So, whenever we count or do math, we use Hindu-Arabic numerals. They make it easy for us to work with numbers and do all kinds of calculations. Cool, right?