Divisibility facts

• Mathematics
• Lower Secondary (Key Stage 3)

Divisibility facts

• ILOs: In this session you will learn how to:
  
• Identify how to divide numbers based on the digits within a number
  
• Simplify a fraction

Numbers that can be divided by 2

• Even numbers
• Numbers that end in 0,2,4,6 and 8. 

Give an example of an even number

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What can numbers ending in 0 be divided by?

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Dividing by 3

• If the sum of the digits of a number adds up to 3, 6 or 9...
• that number can be divided by 3. 
• 201 can be divided by 3
• 33 can be divided by 3
• 51 can be divided by 3
• 8001 can be divided by 3.

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Numbers that can be divided by 3

Dividing by 6

• Same rule as divisible by 3
• If the sum of the digits of a number adds up to 3, 6 or 9
• that number can be divided by 6 if..
• It is an even number
• So
• 102 can be divided by 6
• 24 can be divided by 6
• 720 can be divided by 6. 

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Give an example of a number that can be divided by 6.

Dividing by 9

• If the sum of the digits of a number adds up to 9, then that number can be divided by 9
• 108 can be divided by 9
• 702 can be divided by 9
• 27 can be divided by 9
• 63 can be divided by 9

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Give an example of a number that can be divided by 9.

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How do you feel about divisibility rules?

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