Subtract 1.412 km from 3.69 km.

Options

A. 1.728km
B. 2.278 km
C. 2.728km
D. 1.278 km

Answer

To solve the problem of subtracting 1.412 km from 3.69 km, we will follow these steps:

### Step 1: Align the numbers by the decimal point
Write the numbers one below the other, ensuring that the decimal points are aligned.

```
3.690 (We can add a zero to 3.69 to make it 3.690 for easier subtraction)
- 1.412
```

### Step 2: Subtract the numbers starting from the rightmost digit
Now we will subtract each column starting from the rightmost digit (the thousandths place).

1. **Thousandths place**: 0 - 2
- We cannot subtract 2 from 0, so we need to borrow from the next column.
- Borrow 1 from the 9 (which becomes 8), making the 0 into 10.
- Now we have: 10 - 2 = 8.

2. **Hundredths place**: 8 - 1
- Now we subtract: 8 - 1 = 7.

3. **Tenths place**: 6 - 4
- Now we subtract: 6 - 4 = 2.

4. **Units place**: 3 - 1
- Now we subtract: 3 - 1 = 2.

### Step 3: Combine the results
Now we combine the results from each column:

```
2.278
```

So, the result of subtracting 1.412 km from 3.69 km is **2.278 km**.

### Final Answer:
**2.278 km**

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