Multiplying 23 × 19 Using Partial Products

This video describes how to use the partial products strategy with multiplication. The mathematics problem in this video requires regrouping. Although the partial sums strategy eliminates the regrouping during multiplication, regrouping may still be necessary when students add each of the partial products (i.e., when the sum of the partial products is greater than 10). The partial sums strategy is typically performed left to right and focuses on multiplying each part of the multi-digit number separately. For this reason, the partial products strategy may be inefficient to use with numbers that have many digits. Like the traditional algorithm, the partial products strategy requires that students follow a specific set of steps, so it is important that they have mastered a conceptual understanding of multiplication before applying this strategy.

View additional videos in the Place Value Computation Series

Developed By: 
National Center on Intensive Intervention