Answer:

Explanation:
Lesson: Expanded form
We have the expanded form of a number given, which is

Split all numbers into their places.
Thousands, Hundreds, Tens, and Ones.
6,000 is in the thousands place, therefore it will be first.
6,
100 is in the hundreds place, therefore it will be second.
6,1
90 is in the tens place, therefore it will be third.
6,19
1 is in the ones place, therefore it will be fourth.
6,191
Therefore OD 6,191 is your answer.