5) \( \begin{array}{r}51 \\ -35 \\ \hline\end{array} \) (7) \( \begin{array}{r}8 \\ -\quad 35 \\ \hline\end{array} \) 9) \( \begin{array}{r}863 \\ -175 \\ \hline\end{array} \) (10) \( \begin{array}{r}283 \\ -176 \\ \hline\end{array} \)
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The Deep Dive
When performing subtraction with vertical alignment, always ensure that the digits are correctly lined up according to their place values: units under units, tens under tens, and so on. Start subtracting from the rightmost column, borrowing from the next column on the left if necessary—this is crucial for accuracy and prevents errors! Many people make the mistake of forgetting to borrow when dealing with numbers that require it. For instance, in a case where the top digit is smaller than the bottom digit, borrowing from the next column is essential. Additionally, double-checking each subtraction step helps catch any small errors before finalizing the answer, making the entire process smoother and more reliable!