Divisibility Rules

what is the divisibility rule for 4

• Last two numbers divisible by 4

• Last 3 numbers divisible by 4

• Add all of the digits and divide by 4

• Even number

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CCSS.4.OA.B.4

Which number is divisible by 6

• 1782

• 1213

• 536

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CCSS.4.OA.B.4

Which number is divisible by 2, 5, and 10?

• 1 234 567

• 872 890

• 574

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CCSS.4.OA.B.4

Which number is divisible by 9

• 345

• 8522

• 98874

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CCSS.4.OA.B.4

Why does the divisibility rule for 6, that if a number is divisible by 2 and 3 then it is divisible by 6.

• Because 2x3= 6

• 2 and 3 are the prime factors for 6

• You add up all of the digits and then divide by 6.

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CCSS.4.OA.B.4

Which number is divisible by 4 and 8

• 6657

• 7990

• 554672

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CCSS.4.OA.B.4

Which number is divisible by 9

• 65 968

• 4 321

• 432

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CCSS.4.OA.B.4

If a number is divisible by 9 what other number is it divisible by?

• 3

• 4

• 6

• 8

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CCSS.4.OA.B.4

Which number is divisible by 2,3,4,5,6,8,9, and 10

• 2 520

• 765 894

• 820

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CCSS.4.OA.B.4

What is a prime factor?

• A number that can only be divided by one

• 2 or more numbers that are divisors of a number and can not be divided by another number making it smaller

• a tree like image filled with numbers

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CCSS.4.OA.B.4