??? WHY ???

Why is it important to have a clear explanation than a right answer in maths and science?

It is more important to have a clear explanation than a right answer because if you only has the right answer but you don't have the explanation, the teacher might think you copied other people' answer.
And if you has the explanation but you don't has the right answer. It is easier to know where did you do wrong.
And explanation can help you to remember how do you did that, so if you forgot how to do that problem you can go back and watch the explanation.