1. The problem is to find the sum of 10 and 20.
2. The formula for addition is $a + b = c$, where $a$ and $b$ are numbers and $c$ is their sum.
3. Applying the formula: $10 + 20 = 30$.
4. Therefore, the sum of 10 and 20 is 30.
Simple Addition Ff38Ff
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