# Lesson overview:Using arrays to multiply a 2 digit number by a 1 digit number

- In this lesson, we will learn to multiply 2 digit numbers by 1 digit numbers using arrays. We will construct suitable arrays to represent a number, and partition them to make a multiplication calculation clearer.

## Core Content

- In this lesson, we will learn to multiply 2 digit numbers by 1 digit numbers using arrays. We will construct suitable arrays to represent a number, and partition them to make a multiplication calculation clearer.

## Deriving multiplication and division facts:

- Looking at multiplication strategies and the effect on the product
- Multiplying numbers by 10 and 100
- Linking place value and multiplication
- Dividing by 10 using place value
- Multiplying and dividing by 100
- Exploring division strategies
- Deriving new facts from multiplication facts
- Using arrays to multiply a 2 digit number by a 1 digit number
- Using Dienes to multiply a 2 digit number by a 1 digit number
- Exploring commutativity in multiplication
- Exploring commutativity
- Dividing by a one digit number (no regrouping)
- Solving multiplication and division problems using the bar model
- Solving multiplication and division problems by drawing the bar model
- Identifying known and unknown relationships