Here is a method for multiplying 97 and 103:

1. Explain how this diagram is used to compute .
2. Draw a similar diagram that helps you mentally compute . What is the result? What multiplication problem did you just solve?
3. Use this method to compute:

Complete each diagram. Write some equivalent expressions based on the diagram.

1. 		7
   10
   -7	-70

2. 		8
   -8

3. 		-9
   9

5. 	7
   7	49