At the start of a journey, the meter of a car reads 678.3 km. At the end of the journey, the meter reads 913.5 km. What was the distance covered by the car during the journey?

Options

A. 687.3 km
B. 931.5 km
C. 1591.8 km
D. 235.2 km

Answer

To find the distance covered by the car during the journey, we need to subtract the initial meter reading from the final meter reading. Here are the steps to solve the problem:

1. **Identify the initial and final readings**:
- Initial reading = 678.3 km
- Final reading = 913.5 km

2. **Set up the subtraction**:
- Distance covered = Final reading - Initial reading
- Distance covered = 913.5 km - 678.3 km

3. **Perform the subtraction**:
- Align the numbers for subtraction:
```
913.5
- 678.3
---------
```
- Start from the rightmost digit:
- Subtract the tenths: 5 - 3 = 2
- Subtract the units: 3 - 8 (since 3 is smaller, we need to borrow from the next column):
- Borrow 1 from the tens column (making it 0), so we have 13 - 8 = 5.
- Subtract the tens: 0 - 7 (again, we need to borrow):
- Borrow 1 from the hundreds column (making it 8), so we have 10 - 7 = 3.
- Subtract the hundreds: 8 - 6 = 2.

4. **Combine the results**:
- The result of the subtraction is:
```
235.2 km
```

5. **Conclusion**:
- The distance covered by the car during the journey is **235.2 km**.