a. \( 10+(-20)= \)

When you add a positive number to a negative number, it’s like going forward and then taking a few steps back. So in this case, starting from 10 and moving back 20 units lands you at -10. It's a little mathematical dance where the negatives end up leading! Now, if you're ever working with integers and find yourself confused about where to go next, remember to visualize it on a number line. Picture hopping forward and backward! This can help you avoid common pitfalls such as mixing up the signs or forgetting to carry over values when necessary.