How do we know how to do the expanded form for 3,552,308,725

Answer 1

3,552,308,725

3,000,000,000
+ 500,000,000
+ 52,000,000
+ 300,000
+ 8,000
+ 700
+ 20
+ 5

http://www.studyzone.org/testprep/math4/d/expandedform4l.cfm