Write down the largest five-digit number using the digits 4, 2,5,3,8, using each digit once.

To write down the largest number, you need to correctly place the numbers. The largest digit should be in place of the larger digit. That is, in place of tens of thousands, there should be a figure “8”. In place of thousands – the largest number of the remaining, that is, “5” and so on. Let’s write down the number:

85,432;

Now you need to round the number to thousands. The number “4” stands in place of the hundreds, which means that “5” will remain in place of the thousands. If instead of “4” there was a number “5” or more, then we would add one to thousands, using the rounding rules. We get the answer:

85,000.