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To solve this problem, we'll follow these steps:
Write the result beneath the line in the units column:
Write the result to the left of the in the tens column:
Therefore, the solution to the problem is .
42
\( \begin{aligned} &90 \\ +& \\ &~~9\\ &\underline{\phantom{776}} & \\ \end{aligned} \)
Place value matters! Each digit represents a different value based on its position. The 1 in 10 means ten, while the 3 in 32 means thirty. Lining them up ensures you add the right values together.
That's normal! In this problem, 10 has a 0 in the units place. You can think of it as adding 0 + 2 = 2. The shorter number just has invisible zeros in the empty places.
Yes! Always start with the rightmost column (units place) and work left. This follows the same pattern you'll use later with carrying in more complex problems.
Try adding the numbers in your head or use the commutative property: . You can also subtract: ✓
Vertical addition helps you see place values clearly and prepares you for harder problems with carrying. Horizontal addition like 10 + 32 works for simple problems but gets messy with larger numbers.
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