What should be added to 2.06 to get 3.1?

Options

A. 1.4
B. 1.24
C. 1.04
D. none of these

Answer

To solve the question "What should be added to 2.06 to get 3.1?", we can follow these steps:

### Step-by-Step Solution:

1. **Define the Unknown**: Let the number that needs to be added to 2.06 be represented as \( x \).

2. **Set Up the Equation**: According to the question, we can write the equation:
\[ 2.06 + x = 3.1 \]

3. **Isolate \( x \)**: To find \( x \), we need to isolate it on one side of the equation. We can do this by subtracting 2.06 from both sides:
\[ x = 3.1 - 2.06 \]

4. **Perform the Subtraction**: Now, we need to subtract 2.06 from 3.1. To make the subtraction easier, we can represent 3.1 as 3.10:
\[ 3.10 - 2.06 \]
Aligning the decimal points, we perform the subtraction:
- Start from the rightmost digit: \( 0 - 6 \) requires borrowing, so we take 1 from the 3 (making it 2) and the 0 becomes 10. Now, \( 10 - 6 = 4 \).
- Next column: \( 0 - 0 = 0 \).
- Last column: \( 2 - 2 = 0 \).

So, we have:
\[ 3.10 - 2.06 = 1.04 \]

5. **Conclusion**: Therefore, the value of \( x \) is:
\[ x = 1.04 \]

### Final Answer:
The number that should be added to 2.06 to get 3.1 is **1.04**.

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