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To solve this problem, we'll follow these steps:
Now, let's work through each step:
Step 1: Vertical alignment:
Step 2: Units column (no carry over).
Step 3: Tens column .
Step 4: Combining the tens and units results: the number is .
Therefore, the sum of and is . The correct choice from the provided options is choice .
48
\( \begin{aligned} &90 \\ +& \\ &~~9\\ &\underline{\phantom{776}} & \\ \end{aligned} \)
The single digit 4 actually represents 4 ones and 0 tens. Writing it as 04 helps you see that the tens place is empty, making alignment clearer for vertical addition.
Always start with the rightmost column (ones place) and work left. This is important because if you need to carry over, it affects the next column to the left.
Remember: the rightmost digit is always ones, the next left is tens, then hundreds. Use place value charts or grid paper to help keep columns straight!
No carrying needed here! Since in the ones column, and 8 is less than 10, we simply write 8 and move to the tens column.
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