Adding and Subtracting One-Digit Numbers (6)

Example :    9 - 6 = 3 

Step 1: Set 9. 

Step 2: After moving down 1 with the index finger, move up 5 with the same finger. 

Note: This example shows how to subtract both one or more 1-unit beads and a 5-unit bead. The problems to which this procedure applies are:

9—9 

9—8 

8—7 

8—6        

7—7        

6—6