## Lesson: Multidigit by One-Digit Multiplication

Developing the Concept

In this lesson, students use the expanded form of numbers to multiply with two- and three-digit factors. Be sure to provide enough practice with multiplication facts and multiplying with multiples of 10 and 100 before covering this topic.

**Materials:** none

**Preparation:** none

**Prerequisite Skills and Background:** Students should know the basic multiplication facts and how to use mental math to multiply with multiples of 10 and 100. They should also know how to write numbers in expanded form.

**Wrap-Up and Assessment Hints**

Students need time to develop confidence and understanding of multidigit multiplication. When you assess students' progress, take extra time to ensure that students understand the importance of place value in multiplication.