Divisibility Rules!

What is the divisibility rule for 5?

• The digits must add up to 10.
• The last digit needs to be a 5 or 0.
• The last digit can only be a 5.
• The sum of the digits need to be divisible by 5.

Tags

CCSS.5.OA.B.3

Is 525 divisible by 5?

• Yes
• No

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CCSS.4.NBT.B.6

CCSS.4.OA.B.4

All of these numbers are divisible by 5 except for...

• 75,395
• 984,940
• 222,222,235
• 8,943,892

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CCSS.4.OA.B.4

Which of the following is an even number?

• 1
• 9
• 4
• 5

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CCSS.2.OA.C.3

Is 1,284,604 divisible by 2?

• Yes, because the sum of the digits is 20, which is an even number

• No, because 4 is an odd number

• Yes, because 4 is an even number

• No, because the it is not divisible by 3

Tags

CCSS.4.NBT.B.6

CCSS.4.OA.B.4

What is the divisibility rule for 3?

• Add up the digits. The sum must be an even number

• The digits must add up to 9.

• The last digit must be a 3.

• Add up the digits. The sum must be a multiple of 3.

Is 81 divisible by 3?

• Yes, because the sum of the digits is 9, a multiple of 3

• No, because 81 is an odd number

• Yes, because 81 is an odd number

• No, because 81 does not end in 3

Tags

CCSS.4.OA.B.4

Is 816 divisible by 3?

• Yes
• No

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CCSS.6.NS.B.2

Is 555,509 divisible by 3?

• Yes

• No

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CCSS.6.NS.B.2

2520 is divisible by 6 because:

• It is divisible by 2 (even) and 5 (ends in a 0 or 5)

• The sum of the digits is 12, a multiple of 6

• It's divisible by 2 (even) and 3 (sum of digits is a multiple of 3)

• The sum of the digits is even

Tags

CCSS.4.OA.B.4