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Let's solve the subtraction problem by following these steps:
First, align the numbers vertically:
Starting with the rightmost digits:
This results in:
Therefore, the solution to the problem is .
476
\( \begin{aligned} &105 \\ -& \\ &~~~~3 \\ &\underline{\phantom{776}} & \\ \end{aligned} \)
Because place value matters! The number 2 represents 2 units, so it must go in the units column under the 8. If you put it under the 7 (tens place), you'd be subtracting 20 instead of 2.
When subtracting a smaller number from a larger one, bring down any digits that don't have a corresponding digit to subtract. The 4 and 7 in 478 stay the same because there's nothing to subtract from them.
Use addition to check subtraction! Add your answer to what you subtracted: . If you get the original number, your answer is correct.
Yes! whether written horizontally or vertically. The vertical format just helps you keep track of place values more easily, especially with larger numbers.
Then you'd need to borrow from the tens place! You'd change the 8 to 18, subtract 9 to get 9, and reduce the 7 to 6. But in this problem, 8 > 2, so no borrowing needed.
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