Divide to 100 with Regrouping: Base 10 Discs 3-111
Transition to dividing numbers (dividends) that need regrouping. What's 45÷3? The expanded form of 45 is 40+5, but neither is a multiple of 3. Shift 10 to make 30+15, both multiples of 3. Since 30÷3 = 10, 15÷3 = 5, and 10+5 = 15, 45÷3 = 15. Apply the distributive property by adding partial quotients to get the total quotient.
