ML AggarwalSolutions for Class 6 Maths Chapter 1 Knowing Our Numbers

Before the invention of numbers, counting was done using some physical objects such as pebbles or sticks. The numbers came into existence, eventually and then the need for adapting to a standard system of counting. A numeral system (or system of numeration) is a system for expressing numbers; consistently using digits or other symbols. The number the numeral represents is called its value. The most commonly used system of numerals is the Hindu–Arabic numeral system which was invented by Indian mathematicians.

The International number system is another method of representing numbers. In the International numbering system also, different periods are formed to read the large numbers easily. The periods used here are ones, thousand and millions, etc. As per the International numeration system, the first comma is placed after the hundreds place. Commas are then placed after every three digits.