Answer:
The answers are Two and seventy hundred eighty-nine thousandths and 2.0+0.7+0.78+0.789
Step-by-step explanation:
In order to express the decimal number in its word form and in its expanded form, we have to know some notation about the position of every number.
In word form, you have to write the number in words. Every number position has a notation, both the whole number part as the decimal part.
I have attached two images that show some notations and examples about writting decimal numbers.
In expanded form, you have to separate the number in additions.
So, in this case:
Word form:
2.789= Two and seventy hundred eighty-nine thousandths
Expanded form:
2.789=2.0+0.7+0.78+0.789