Alright! Let's start at the beginning. We know that Lisa was already 126 feet above sea level before the problem even starts. So 126 will be our base number.
Next, Lisa climbed 277 feet, which means we need to add 277 feet to 126.
277+126=403
Alright. Lisa is now 403 feet high. But, she now needs to climb down 133 feet. Let's represent this by subtracting 133 from 403
403-133=270
Okay! Now we know that Lisa is 270 feet. Since she didn't go anywhere else, that's the end of the problem!!!
