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To solve this problem, we'll follow these steps:
The unit's column: . Write 4 under the units column.
Add: . Write 0 under the tens and carry 1 to the hundreds column.
Add: , and don't forget the carried 1, making it .
Write 5 under the hundreds and carry 1 to the thousands.
Add: . Don't forget the carried 1, making it .
Write 8 under the thousands.
The sum of the numbers is:
Therefore, the sum of 7831 and 673 is .
This corresponds to the choice: 8504
8504
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We start from the ones place because carrying moves from right to left! Just like when counting money - you handle pennies before dimes, dimes before dollars.
Your final answer will be too small! In 7831 + 673, forgetting to carry the 1 from tens to hundreds gives you 8404 instead of the correct 8504.
Write small numbers above the next column to remember your carries. For example, write a small '1' above the hundreds place when you carry from tens.
It's much harder! Adding left to right means you might need to borrow or adjust later. The right-to-left method handles all carrying as you go.
Just imagine leading zeros! For 673, think of it as 0673 when adding to 7831. This keeps everything aligned properly.
Try adding the numbers in reverse order: . You should get the same answer, or use estimation: 7800 + 700 ≈ 8500 ✓
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