



 
Hi Deepak. When we "round numbers off", we use the principle that a 5 or more causes the number to "round up" and 4 or less causes it to "round down". Here are some examples:
Let's see what the smallest and greatest numbers are which when rounded to the nearest thousand become 80000. We know that the number we examine is the digit to the right of the thousands digit, and that is the digit in the hundreds place. To round down, this digit must be a four or less. What is the largest number that starts out 804(something)(something)? It is the number where all the rest of the digits are 9, so the greatest number which rounds to 80000 is 80499. The smallest number is the one that rounds up to 80000. So that means a 5 in the hundreds column. If it rounds up, then we would be adding 1 to the thousands place. That means the smallest number that rounds up to 80000 is the smallest number that starts out with a 79, then a 5, then two more digits: 795(something)(something). So this time Use these examples and explanation to find your answer for your problem. Hope this helps,  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 