Because they originated from the Indian subcontinent then across Arabia and then into Western Europe during the Middle Ages thus replacing Roman numerals that was the numeracy system being used at the time.
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This is because the numbers we use today come from Hinduism.
they develope many elem of nour modernd math system
Well you could use it anywhere for everything for example numbers are part math right? Well when you want to call someone you need to use numbers to call them!
The numbers that we now use today are called Hindu-Arabic numerals in the form of 0 1 2 3 4 5 6 7 8 and 9
They can be in Roman numerals or in Hindu-Arabic numerals which are the numbers that we use today.