Sunita travelled 15km 268 m by bus, 7km 7m by car and 500m on foot in order to reach her school. How far is her school from her residence?

Answer

To find out how far Sunita's school is from her residence, we need to add the distances she traveled by bus, car, and on foot. Let's break it down step by step.

### Step 1: Convert all distances to kilometers
1. **Distance by bus:** 15 km 268 m
- Convert 268 m to kilometers:
\[ 268 \text{ m} = \frac{268}{1000} \text{ km} = 0.268 \text{ km} \]
- Total distance by bus:
\[ 15 \text{ km} + 0.268 \text{ km} = 15.268 \text{ km} \]

2. **Distance by car:** 7 km 7 m
- Convert 7 m to kilometers:
\[ 7 \text{ m} = \frac{7}{1000} \text{ km} = 0.007 \text{ km} \]
- Total distance by car:
\[ 7 \text{ km} + 0.007 \text{ km} = 7.007 \text{ km} \]

3. **Distance on foot:** 500 m
- Convert 500 m to kilometers:
\[ 500 \text{ m} = \frac{500}{1000} \text{ km} = 0.500 \text{ km} \]

### Step 2: Add all distances together
Now we will add the total distances from each mode of transport:
\[ \text{Total distance} = 15.268 \text{ km} + 7.007 \text{ km} + 0.500 \text{ km} \]

### Step 3: Perform the addition
1. Align the numbers for addition:
\[ \begin{array}{r} 15.268 \\ + 7.007 \\ + 0.500 \\ \hline \end{array} \]

2. Add the numbers:
- Start from the rightmost column (thousandths): \( 8 + 7 + 0 = 15 \) (write down 5, carry over 1)
- Next column (hundredths): \( 6 + 0 + 0 + 1 = 7 \)
- Next column (tenths): \( 2 + 0 + 5 = 7 \)
- Next column (units): \( 5 + 7 = 12 \) (write down 2, carry over 1)
- Finally, add the tens: \( 1 + 1 = 2 \)

So, the total distance is:
\[ \text{Total distance} = 22.775 \text{ km} \]

### Final Answer
Sunita's school is **22.775 km** away from her residence.

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