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

1. 

   Hint (a):

   Refer to problem 5-21 if you are having trouble starting this problem.

   Answer (a):

   

2. 

   Hint (b):

   Which numbers add to $9$ and multiply to $20$?

3. 

   Hint (c):

   What number do you need to multiply $3$ by to get $1.5$? Add this to $3$ to get the sum.

4. 

   Hint (d):

   The two numbers will be the same distance from $0$ on the number line, but one will be negative.

   Answer (d):