`0.001div?=0.01`

Options

A. 10
B. 0.1
C. 0.01
D. 0.001

Answer

To solve the equation \( 0.001 \div ? = 0.01 \), we need to find the value of the question mark. Let's denote the question mark as \( x \).

### Step-by-Step Solution:

1. **Set up the equation**:
\[ 0.001 \div x = 0.01 \]

2. **Rewrite the equation**:
We can rewrite the division as multiplication by the reciprocal:
\[ 0.001 = 0.01 \times x \]

3. **Isolate \( x \)**:
To find \( x \), we can divide both sides of the equation by \( 0.01 \):
\[ x = \frac{0.001}{0.01} \]

4. **Perform the division**:
To simplify \( \frac{0.001}{0.01} \), we can convert both numbers to fractions:
\[ \frac{0.001}{0.01} = \frac{1}{1000} \div \frac{1}{100} = \frac{1}{1000} \times \frac{100}{1} = \frac{100}{1000} = \frac{1}{10} \]

5. **Convert the fraction back to decimal**:
\[ \frac{1}{10} = 0.1 \]

6. **Final answer**:
Therefore, the value of \( x \) is:
\[ x = 0.1 \]

### Summary:
The question mark \( ? \) in the equation \( 0.001 \div ? = 0.01 \) is equal to \( 0.1 \).

---