How does writing 3.441 in expanded form show why the same digit can have different values?

Standard Form:

3.441

Expanded forms can be written
like a sentence or stacked for
readability as they are here.

Expanded Numbers Form:

 3 + 0.4+ 0.04+ 0.001
Expanded Factors Form:

 3 ×1 +4 × 0.1+4 × 0.01+1 × 0.001
Expanded Exponential Form:

3 × 100+4 × 10-1+4 × 10-2+1 × 10-3
Word Form:

three and
four hundred forty-one thousandths