Cranmer Abacus 5.2 (Subtraction with 4/5 exchanges)

Cranmer Abacus 5.2 (Subtraction with 4/5 exchanges)

This video walks through the steps of more subtraction problems making the 4-5 exchange. Other videos coming soon on the 9/10, 49/50, and 99/100 exchanges for both addition and subtraction. Happy abacus-ing!