Home | How It Works | Stats Login | Register         Case: Multiplication Dilemma Mrs. Starks, is a fourth grade teacher that has been teaching fourth grade for several years. She has one particular student that quite does not understand how to multiply a three-digit number by a one digit number. She also has offered small group and one on one help to this student, but he still does not understand the concept of regrouping when multiplying. What are some ways that Mrs. Starks can get her student to understand multiplying a three-digit number by a one digit number? Solution: (Rates are posted for this solution!) One strategy that you can try is putting a box over the number that he needs to regroup to. Also let the student know that only one digit can fit in the box.