When multiplying a decimal by a power of 10, the product increases. This is because multiplying by 10, 100, 1000, etc., shifts the decimal point to the right, effectively increasing the value of the number.
When dividing a decimal by a power of 10, the quotient decreases. This is because dividing by 10, 100, 1000, etc., shifts the decimal point to the left, effectively decreasing the value of the number.
So, to summarize:
- Multiplying a decimal by a power of 10: increases
- Dividing a decimal by a power of 10: decreases