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To solve this subtraction problem, we follow these straightforward steps:
Now, let's explain each step in detail:
Step 1: Align the numbers:
Step 2: Start with the rightmost column (units). Subtract 6 from 7. As 7 is greater than 6, this is straightforward:
Step 3: Move to the tens column. Here, subtract 1 from 3. Again, since 3 is greater than 1:
Step 4: Now for the hundreds column. Subtract 2 from 5:
Putting it all together, we find that the result is 321.
Therefore, the solution to the problem is .
321
\( \begin{aligned} &15 \\ -& \\ &~~4 \\ &\underline{\phantom{776}} & \\ \end{aligned} \)
We start from the ones column (rightmost) because that's where place value begins! Just like counting, we handle the smallest values first before moving to tens and hundreds.
Great question! When that happens, you need to borrow from the next column to the left. In this problem, all top digits were larger, so no borrowing was needed.
Use addition to check! Add your answer to the number you subtracted: . If you get the original top number, you're right!
In vertical subtraction like this, you always subtract the bottom number from the top number, regardless of size. The top number is called the minuend, the bottom is the subtrahend.
Place value alignment means putting digits in the correct columns:
This ensures you subtract the right amounts!
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