The value of the digit 4 in 472590 is four hundred thousand.
Absolutely ! There are many solutions - the lowest is... 1999-999=1000 *Side note* Actually, the solution when looking for the lowest value of the term that still gives you a four-digit differance, has to be found in the answer of 1100 - 100 = 1000, since 100 is the - using your word- "lowest" value of a three digit-number, as well as 1000 being the "lowest" four-digit number.
In the number 463211889, the digit 4 has the value of 4 x 109, or 4000000000. That gives it the gratest value, numerically in the number as a whole.
There are infinitely many answers. One possible answer is 1231231234123.
A number does not have a place value - a digit within the number has. For example 234 has no place value but the digit 4 has a place value of 40.
The value of the digit 4 in the number 2.6741 is four thousandths.
Place value only makes sense for a single digit - not a 4-digit number!
There is no underlined digit in the question.