# Using Dienes 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 Dienes blocks. We will use visual representations to make multiplication processes clearer, and we will investigate when to regroup quantities when using Dienes blocks.

### 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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### 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
Q5.
18 x 4 =
76
84
Q6.
Use what you know about place value to work out 180 x 4 =
760
840

## Exit quiz

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### 5 Questions

Q1.
What is 22 x 4?
66
80
Q2.
What is the missing word? If there are ten or more ones, we must ______________ the ones into tens and ones.
partition
recombine
Q3.
Do you need to regroup ones into tens when calculating 11 x 7?
Yes
Q4.
Do you need to regroup tens when calculating 43 x 4?
No