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To solve this subtraction problem using vertical subtraction, we will follow these steps:
Let's perform the subtraction:
Here's how the subtraction is processed:
Therefore, the result of the subtraction is .
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\( \begin{aligned} &15 \\ -& \\ &~~4 \\ &\underline{\phantom{776}} & \\ \end{aligned} \)
You can't subtract a larger number from a smaller one and get a positive result! Borrowing lets you 'trade' 1 from the next column for 10 in the current column, making subtraction possible.
Always borrow from the column immediately to the left. If that column is 0, keep moving left until you find a non-zero digit to borrow from.
The digit you borrow from gets reduced by 1. For example, if you borrow from 9, it becomes 8. This is crucial - forgetting this step leads to wrong answers!
Yes! Addition is the opposite of subtraction. Add your answer to the number you subtracted: . If you get the original number, you're correct!
When you encounter a 0, you need to borrow from further left. The 0 becomes 9 after borrowing, and you continue the process until you reach a non-zero digit.
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