Copy and complete each of the Diamond Problems below. The pattern used in the Diamond Problems is shown at right.  

1. 

   Step 1(a):

   Multiply $8$ by $−8$ to get $xy$.
   $8(−8)=−64$

   Step 2(a):

   Add $8$ to $-8$ to get $x+y$.
   $8+(−8)=0$

   Answer (a):

   

2. 

   Hint 1(b):

   What are the factors of $−25$?

   Hint 2(b):

   Which of these add to $0$?

3. 

   Hint (c):

   Divide $−12$ by $4$ to find $y$.

   Answer (c):

   

4. 

   Hint (d):

   Use the pattern in the diamond and remember your negative signs.