Compare, order and round off numbers All the positive numbers \( 1 ; 2 ; 3 ; 4 ; \ldots \) are called the set of natural n (or counting numbers). If we include 0 in the set of natural number get the set of whole numbers. We use numbers to add, subtract, \( n \) and divide. We can also write numbers in a particular order. For exa the numbers \( 124 ; 2514 ; 479180 ; 9823010 \) are written in order of smallest to largest.

Did you know that the concept of ordering numbers dates back to ancient times? The Babylonians, around 2000 BC, had their own numeral system and were known for their advanced mathematical concepts, including ways to arrange numbers. They used a base-60 system, which still affects how we measure time today—60 seconds in a minute and 60 minutes in an hour! When rounding off numbers, many people make the common mistake of rounding up when the decimal is exactly halfway, such as .5. A good tip is to check which way you're rounding: if you're following “round half to even” (also known as "bankers’ rounding"), you'll round to the nearest even number. So, 2.5 would round to 2, and 3.5 would round to 4. This technique helps in reducing cumulative rounding error in computations!