1. The problem asks how multiplying a number by 10 affects the position of the decimal point. 2. When you multiply a number by 10, you are increasing its value by a factor of 10. 3. In decimal notation, multiplying by 10 shifts all digits one place to the left, which means the decimal point moves one place to the right. 4. For example, if you have the number $3.5$, multiplying by 10 gives: $$3.5 \times 10 = 35.0$$ Here, the decimal point moved one place to the right. 5. Therefore, the correct statement is: "Multiplying by 10 moves the decimal one place to the right."