The given expression is

First we convert both of the mixed number in improper fraction. That is



You can hardley see that but 36 8/10
For the top problem, you split it to make two rectangles and so you have 4 times 5 =20 plus 1 times 3 so the answer is 23cm squared
I think this is a trick question. That’s because 5.61 is the width, 2.3 is the thickness, and 13.672 is the length. If they are cutting it into 3 strips, wouldn’t you just multiply 13.672 by 3 to get 41.016? That would be the total length right?