# Use the divisibility rules to find multiples of 3

I know the divisibility rule for multiples of 3 and can use it with 3- and 4-digit numbers.

# Use the divisibility rules to find multiples of 3

I know the divisibility rule for multiples of 3 and can use it with 3- and 4-digit numbers.

## Slide deck

## Lesson details

### Key learning points

- Numbers that can be divided by 3 and leave no remainder are divisible by 3
- To find the digit sum of a number, add the digits in the number together so the digit sum of 17 is 1 + 7 which equals 8
- For a number to be divisible by three, the dgit sum of the number must be a divisible by 3

### Common misconception

Lack of understanding of key terms such as: 'digit,' 'number.'

Explain clearly the difference between the two key terms and encourage children to test the divisibility rule on both 3 digit and 4 digit numbers.

### Keywords

Digit sum - The sum of the digits of a number is called its digit sum.

Divisible / Divisibility - Divisibility is when division of a number results in another whole number. A number is divisible by another if it can be shared exactly with no remainder.

Multiple - A multiple is the result of multiplying a number by another whole number.

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Video

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## Worksheet

## Starter quiz

### 6 Questions

18

21

27

15

24

## Exit quiz

### 6 Questions

7

11

21

10