\begin{equation}
4000+400=4400
\end{equation}
Writing this using place value:
Digit’s place
Thousand’s
Hundred’s
Ten’s
One’s
Digit
4
0
Place value
4 \times 10^{3}
4 \times 10^{2}
0 \times 10^{1}
0 \times 1
Hence in words 4400 will be “Four Thousand four hundred”
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