What should be subtracted from . 1 to get .03?

Options

A. 0.7
B. 0.07
C. 0.007
D. none of these

Answer

To solve the question "What should be subtracted from 0.1 to get 0.03?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Problem**: We need to find a number (let's call it \( x \)) that, when subtracted from 0.1, gives us 0.03.

2. **Set Up the Equation**: According to the problem, we can write the equation as:
\[ 0.1 - x = 0.03 \]

3. **Rearrange the Equation**: To find \( x \), we need to isolate it. We can do this by moving \( x \) to one side and 0.03 to the other side:
\[ x = 0.1 - 0.03 \]

4. **Perform the Subtraction**: Now, we need to subtract 0.03 from 0.1. To do this, we can align the decimals:
\[ \begin{array}{r} 0.10 \\ - 0.03 \\ \hline \end{array} \]
- Start from the rightmost digit: \( 0 - 3 \) cannot be done, so we borrow 1 from the tenths place (making it 0.0) and the 0 becomes 10.
- Now, \( 10 - 3 = 7 \).
- In the tenths place, we have \( 0 - 0 = 0 \).

Thus, the result is:
\[ 0.07 \]

5. **Conclusion**: Therefore, the number that should be subtracted from 0.1 to get 0.03 is:
\[ x = 0.07 \]

### Final Answer:
The answer is \( 0.07 \).

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