One thousand = 1000
two hundred = 200
eighty = 80
six = 6
For word form, change the standard form into words:
Word form: One thousand, two hundred, and eighty-six
For standard form, change the words into numbers
Standard form: 1,286
For expanded form, expand the number so that each value number is separated
Expanded form: 1000 + 200 + 80 + 6
hope this helps