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.
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).
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