Year 3

Year 3

# Using arrays to multiply a 2 digit number by a 1 digit number

## Lesson details

### Key learning points

1. 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.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
What does the word 'derive' mean?
Divide
Correct answer: Get more out of
Use the inverse
Q2.
Which of the following are strategies for deriving facts?
Correct answer: All of the above
Doubling
Halving
Multiplication and division are inverse operations
Multiplication is commutative
Place value
Q3.
Which fact can be derived from 2 x 4 = 8
4 x 5 = 20
4 x 8 = 2
Correct answer: 8 divided by 2 is equal to 4
Q4.
What fact can be derived from 6 divided by 2 is equal to 3?
2 + 3 = 5
6 multiplied by 2 is equal to 3
Correct answer: 60 divided by 2 is equal to 30
Q5.
Which fact can be derived from 4 x 6 = 24?
2 + 6 = 8
40 x 2 = 80
Correct answer: 8 x 3 = 24

## Exit quiz

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### 6 Questions

Q1.
Which is an example of partitioning?
10 divided by 2
Correct answer: 32 = 30 + 2
6 x 3
Q2.
Partitioning makes multiplying two digit numbers easier.
False
Q3.
13 x 5 =
45
55
Q4.
17 x 3 =
121
24