A deep-sea diver descended from a rock that is 45 feet below sea level to a coral reef that is 88 feet below sea level. How far did the diver descend from the rock to the coral reef?

**we did it this way, is this right?
-45-(-88)
-45+88=43
He descended 43 feet from the rock to the coral reef.

Correct.

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Yes, the method you used to find the distance the diver descended from the rock to the coral reef is correct. Let me explain it in more detail.

To find the distance the diver descended, you need to subtract the depth of the rock from the depth of the coral reef. In this case, the depth of the rock is -45 feet below sea level (since it is below sea level) and the depth of the coral reef is -88 feet below sea level. When you subtract a negative number, it becomes adding a positive number.

So, you can calculate it as follows:

-45 - (-88) = -45 + 88 = 43

Therefore, the diver descended 43 feet from the rock to the coral reef.