Question

http://i.imgur.com/TPg4HEN.png

Answer 1

the shaded region would be a large rectangle minus a small rectangle right?
and area of a rectangle = (base) times (height)

so first find the area of the big rectangle
(base) times (height) = 25 times 12.5 = ?

Answer 2

312.5?

Answer 3

yes :)
then find the area of the small rectangle
(base) times (height) = 15 times 7.5 = ?

Answer 4

112.5 right

Answer 5

yes
then subtract the two number you got ^_^

Answer 6

312.5 minus 112.5 = ?

Answer 7

@Adrian93334 we weren't done here

Answer 8

but im going to sleep son

Answer 9

well it's simple subtraction
312.5 minus 112.5 = (answer)