The sum of $12.829 + 10.07$ is:

$12.829 + 10.07 = 22.899$

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Here are five related questions:

1. What is $15.836 + 9.47$?
2. What is $23.25 + 18.456$?
3. Can you calculate $7.923 + 6.781$?
4. What is $19.84 + 12.033$?
5. Solve $11.45 + 13.389$.

Tip: When adding decimal numbers, aligning the decimal points makes it easier to ensure accurate addition.