The largest 10-digit number with no digit repeated is 9876543210 !
5499. To round to the nearest thousand, the hundreds digit would be the decider: if 5 or more it would round up, 4 or less would round down. Need to round down, so the hundreds digit must be 4. The tens and units make no difference, so have them as large are possible, namely 9 each, to give: 5499 as the largest whole number that rounds to 5000 to the nearest 1000. A quick way is to observe 1000/2 = 500, so need to add 1 less than this (499) to the number and it will round down, that is 5000 + 1000/2 - 1 = 5000 + 500 - 1 = 5499.
The answer depends on the degree to which the number needs to be rounded.
It is when you subtract the largest number from the smallest number.
Round the number to the nearest tenth.
1
It is 700000.
700000
We look at the digit in the ten thousandth position. As it is a 3, it will round the number down to give 700000 as the result.
699999
7000001
A six-digit number will round to the nearest hundred thousand. Since the number in the ten thousands place is less than 5 (the number is less than 750,000) round down. 737,121 rounds off to 700,000.
890
349
849
64
Seven hundred thousand.