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Multiple a 2 digit number by a one digit number using partitioning

In this worksheet, students must multiply simple 2-digit numbers by a 1-digit number.

'Multiple a 2 digit number by a one digit number using partitioning' worksheet

Key stage:  KS 2

Curriculum topic:   Number: Multiplication and Division

Curriculum subtopic:   Write Multiplication/Division Statements for Known Tables

Difficulty level:  

Worksheet Overview

In this activity, we will be multiplying a two-digit number by a one-digit number.

 

To do this, we need to partition the two-digit number into its place value. 

 

So, let's try multiplying 22 by 7

 

The first step is to partition 22.

22 can be partitioned into 20 and 2.

 

The next step is to multiply the ones and tens by 7.

2 × 7 = 14

20 × 7 = 140

 

The final step is to add the products together.

140 + 14 = 154

 

So, 22 × 7 = 154

 

Let's try an example question together. 

 

Example

Work out the missing number:  

23 × 4 =         

 

Answer

We are trying to work out 23 lots of 4.

23 can be partitioned into 20 and 3.

 

So we work out 20 lots of 4 and then 3 lots of 4.

20 × 4 =  80 

3 × 4 =  12 

 

Now add the products together.  

80 + 12 =  92

 

So, 23 × 4 =  92

 

Now you've seen the method to use, it's your turn to try some questions.  

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