Use the column method to subtract 38.4 from 120
The correct answer and explanation is:
To subtract 38.4 from 120 using the column method, follow these steps:
- Write the numbers vertically, aligning the decimal points:
120.0
- 38.4
2. Start from the rightmost column, which is the tenths place. Since 0 is less than 4, you'll need to borrow from the ones place:
- In the ones place, 0 is less than 8, so you need to borrow from the tens place.
- Borrow 1 from the tens place, turning the 2 into a 1, and the 0 becomes 10.
Now you have:
110.10
- 38.4
3. In the tenths place, subtract 4 from 10, which gives you 6.
110.6
- 38.4
4. Next, subtract the digits in the ones place. In the ones column, you have 1 minus 8. Since 1 is less than 8, you need to borrow 1 from the hundreds place, turning the 1 into 0 and the 1 into 11.
Now you have:
110.6
- 38.4
5. Now subtract 8 from 11, which gives you 3.
72.6
6. Finally, subtract the digits in the hundreds column. You have 0 minus 3, which leaves you with a 7.
So the final result is:
72.6
### Final Answer: 72.6
This method is effective because it follows the standard process of subtraction, ensuring each column is handled carefully, especially when borrowing is necessary. The result reflects the difference between 120 and 38.4.