The temperature in Simla on night was `-4^(@)C` and the next day the temperature went up to `7^(@)C`.
Find the difference between the lowest and the highest temperature.

Answer

To find the difference between the lowest and highest temperatures in Simla, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Highest Temperature**:
The highest temperature recorded is \( 7^\circ C \).

2. **Identify the Lowest Temperature**:
The lowest temperature recorded is \( -4^\circ C \).

3. **Calculate the Difference**:
To find the difference between the highest and lowest temperatures, we can use the formula:
\[ \text{Difference} = \text{Highest Temperature} - \text{Lowest Temperature} \]
Substituting the values we have:
\[ \text{Difference} = 7 - (-4) \]

4. **Simplify the Expression**:
When subtracting a negative number, it is the same as adding the positive equivalent:
\[ 7 - (-4) = 7 + 4 \]

5. **Perform the Addition**:
Now, we can add the two numbers:
\[ 7 + 4 = 11 \]

6. **Final Answer**:
The difference between the lowest and highest temperature is \( 11^\circ C \).