When learning to multiply a single-digit number by another single-digit number, students sometimes don’t understand the concept, and sometimes have trouble remembering the facts. Problem of the Week #11 provides a “manipulative on paper” that can be used by these students to establish an unknown multiplication fact in a conceptual way.

Here is the challenge:  Using only the Number Line shown below and the index finger from each hand (no writing or coloring!), find the product of 3 x 8 in a way that incorporates the “Three How Many’s of Multiplication:” 1. How many are in each group?, 2. How many groups are there?, 3. How many are there altogether?

The solution will be posted next week!