  # Multiplication: Finding Four Times a Number

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

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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