To the nearest thousand: 1499
To the nearest hundred: 1049
To the nearest ten: 1005
With regards to rounding numbers ending in 5, I advocate rounding so that the previous digit becomes an even digit. If 5s are always rounded up [or down] you introduce an upward [downward] rounding bias. The suggested method avoids introducing a rounding bias and is reproducible by others.
The greatest or largest 3 digit number is 999 because the next digit on the number line is 1000 a 4 digit number.
99999 - 1000 = 98999
997
The largest odd four-digit number is 9999. It is odd because it ends with the digit 9, which is an odd number. Being a four-digit number, it falls within the range of 1000 to 9999.
999 - 1000
The smallest 4-digit number is 1000, and the largest 4-digit number is 9999.
The greatest or largest 3 digit number is 999 because the next digit on the number line is 1000 a 4 digit number.
The greatest or largest 3 digit number is 999 because the next digit on the number line is 1000 a 4 digit number.
99999 - 1000 = 98999
997
1499
The largest odd four-digit number is 9999. It is odd because it ends with the digit 9, which is an odd number. Being a four-digit number, it falls within the range of 1000 to 9999.
When rounding to the nearest thousand (1000), half the numbers (1000 ÷ 2 = 500) round up, and the other half round down - except for those which are exactly half-way: they round up. Thus the largest number that will round to 27,000 to the nearest thousand must round down to it and is 27,000 + 500 - 1 = 27,499.
999 - 1000
If you allow non integers, then your smallest four-digit number would be .0001. If you only allow integers, then your smallest four-digit number would be 1000. Your largest four-digit number would be 9999.
The greatest product you can achieve by multiplying a 3-digit number by a 1-digit number is 9720, which comes from multiplying 972 (the largest 3-digit number less than 1000 when divided by 9) by 9 (the largest 1-digit number). Thus, the factors are 972 and 9.
0