What does it mean when they ask you to write the decimal representation of a number.
Looking it up Google for a while,
On some pages, it means to write the value of the number. While on others it means to write it in a form of series. What does it mean when I say, find the decimal representation of $\dfrac{123456}{100}$ Does it mean $1234.56$ or $1 \cdot 10^3 + 2 \cdot 10^2 + 3 \cdot 10^1 + 4 \cdot 10^0 + 5 \cdot 10^{-1} + 6 \cdot 10^{-2}$?
Also what is the difference between Decimal Expansion and Decimal Representation?
Since $1234.56$ is shorthand for $1 \times 10^3 + 2 \times 10^2 + 3 \times 10^1 + 4 \times 10^0 + 5 \times 10^{-1} + 6 \times 10^{-2}$, there is really no difference between these possibilities. And there is also no difference between decimal expansion and decimal representation.