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Multiplication: Finding Four Times a Number

In this worksheet, students multiply numbers by 4 by doubling and doubling again.

'Multiplication: Finding Four Times a Number' 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 worksheet we use a quick number trick to multiply numbers by four.

 

Here are five candles.

 

If we double this number we get 2 × 5 = 10 candles

       

 

If we double this number again we get 2 × 10 = 20 candles

                                 

 

This is 4 lots of the original 5 candles so 4 × 5 = 20

To multiply a number by 4, we double it and double the answer again.

 

 

Example

Find 4 × 5 by using this table to find first A and then B.

 

Twice 5  is 
A
Double 
A
 is 
B
Then 4 × 5  is 
B

 

Answer

Twice 5 is 10, so A is 10.

Double 10 is 20, so B is 20.

So 4 × 5 is 20.

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