Adding and Subtracting One-Digit Numbers (5)

Example :    8 - 5 = 3 

Step 1: Set 8. 

Step 2: Move up 5 with the index finger.  

Note: This example shows the procedure used in subtracting a 5-unit bead. The problems to which this procedure are: 

5—5 

6—5 

7—5 

9—5