When the number you're going to round is exactly between the lower and the bigger number, you always round up. It can't be explained. It's just how it is.
400
350 to 449 -- 100 numbers
350 to 449 -- 100 numbers
400
If you're rounding by the hundreds place it would round to 400. If you're rounding by the tens place it would round to 350. This all depends by which value you decide to round with.
350 and up to
When rounding in the hundreds, you round when the tenths digit is greater than or equal to 5. In this case, 7 isgreater than 5, so you will round the ones digit up to the next- the answer is 400.(400)
To round 350 to one sig fig, you will round to the hundreds place. 350 rounds up to 400 which is one sig fig.
352 rounded to the nearest 10 is 350
400
It's 400 because you round up.
To the nearest hundred, 400
There aren't any numbers that round to 350 to the nearest hundred.
350 to 449 -- 100 numbers
400
350 to 449 -- 100 numbers
If you're rounding by the hundreds place it would round to 400. If you're rounding by the tens place it would round to 350. This all depends by which value you decide to round with.