Using Divisibility Rules for 3, 6, and 9

What is the divisibility rule for 3?

• Add up the digits. The sum must be EVEN and divisible by 3.

• The digits must add up to 9.

• The last digit must be a 3.

• Add up the digits. The sum must be divisible by 3.

Tags

CCSS.4.OA.B.4

252 is divisible by 9 because:

• The digits add up to 18.

• The sum of the digits is divisible by 9.

• It's even and the sum of the digits is divisible by 3.

• The sum of the digits is even.

Tags

CCSS.4.OA.B.4

Is 81 divisible by 3?

• Yes
• No

Tags

CCSS.4.OA.B.4

2520 is divisible by 6 because:

• It's divisible by 2 (0,2,4,6,8 OR EVEN NUMBER) and 3 (sum of digits is a multiple of 3)

• 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

252 is divisible by 9 because:

• The number is divisible by 2 and 3

• The sum of the digits is a multiple of 9.

• The sum of the digits is a multiple of 3

• The sum of the digits is even.

Tags

CCSS.4.OA.B.4

Is 19,584 divisible by 9?

• Yes

• No

Tags

CCSS.4.OA.B.4

Which of these is divisible by 6?

• 515
• 59
• 2086
• 6312

Tags

CCSS.4.OA.B.4

Which of these is divisible by 3?

• 3131
• 71
• 6043
• 804

Tags

CCSS.4.OA.B.4

Which of these is divisible by 6?

• 318
• 215
• 7000
• 4765

Tags

CCSS.4.OA.B.4

Which of these id divisible by 9?

• 1308
• 495
• 361
• 842

Tags

CCSS.4.OA.B.4