Multiplying Decimals by Powers of 10
Multiply.

12100=\displaystyle {12}\cdot{100}= 100.4=\displaystyle {10}\cdot{0.4}=
0.12100=\displaystyle {0.12}\cdot{100}= 0.41000=\displaystyle {0.4}\cdot{1000}=
0.121000=\displaystyle {0.12}\cdot{1000}= 100.04=\displaystyle {10}\cdot{0.04}=