The number to be added to 1.008 to make it 2.009 is

Options

A. `1.001`
B. `0.001`
C. `10.01`
D. `1.002`

Answer

To solve the problem of finding the number that needs to be added to 1.008 to make it 2.009, we can follow these steps:

### Step-by-Step Solution:

1. **Define the Unknown**:
Let the unknown number be represented as \( x \).

2. **Set Up the Equation**:
According to the problem, we need to find the number \( x \) such that when it is added to 1.008, the result is 2.009. This can be expressed in the equation:
\[ 1.008 + x = 2.009 \]

3. **Isolate \( x \)**:
To find \( x \), we need to isolate it on one side of the equation. We can do this by subtracting 1.008 from both sides:
\[ x = 2.009 - 1.008 \]

4. **Perform the Subtraction**:
Now, we will calculate the right side:
\[ x = 2.009 - 1.008 = 1.001 \]

5. **Conclusion**:
Therefore, the number that needs to be added to 1.008 to make it 2.009 is:
\[ x = 1.001 \]

### Final Answer:
The number to be added to 1.008 to make it 2.009 is **1.001**.

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