## Lesson: Multiplication by Two-Digit Numbers

Introducing the Concept

Your students will have multiplied by two-digit numbers before, but they may not have related the process to the Distributive Property. Knowing the connection between the Distributive Property and multiplying by two-digit numbers will benefit your students, especially when solving real-life problems. Of course, students will need to know the basic multiplication facts. Have your students use a multiplication fact chart as necessary.

**Materials:** a large model of a multiplication fact table, sheets of prepared large 11 x 11 grid paper for students to make their own fact charts (see below), and a large 7 x 26 rectangular grid

**Preparation:** Construct a large multiplication fact chart and post it where the students can see it. Prepare sheets of 11 x 11 large grid paper, like the one shown above, for students to make their own fact tables. Construct a large 7 x 26 rectangular grid.

**Prerequisite Skills and Concepts:** Your students should be familiar with the basic multiplication facts and the properties of multiplication, and they should be able to tell you about the Distributive Property of Multiplication. They should also have had some experience in determining the factors and multiples of a given number. They may find it helpful to review multiplication by one-digit numbers.

Post the large 7 x 26 rectangular grid for your students to see.