18. Using only four 4’s and your
math sense... you need to
create equations that will equal
all the digits from 0-9.

19. To make 0 you could write
something as easy as:
44-44=0
Notice how you have used
all four 4’s.

20. Remember Your problem is to
use the four 4’s to create the
digits 0-9. You must only use
four 4’s.