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Divisibility Rules

Divisibility Rules. You can determine if a number is divisible by 2, 3, 5, 6, 9, or 10 by using the rules on the following slides. Divisible by 2:. If a number ends in an even number it is divisible by 2. Examples: 230 122 564 786 988. Divisible by 3:.

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Divisibility Rules

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  1. Divisibility Rules • You can determine if a number is divisible by 2, 3, 5, 6, 9, or 10 by using the rules on the following slides.

  2. Divisible by 2: If a number ends in an even number it is divisible by 2. Examples: 230 122 564 786 988

  3. Divisible by 3: • If the sum of the number’s digits is divisible by 3, the number is divisible by 3. Example: 1,269 1 + 2 + 6 + 9 = 18 3 will go in to 18 evenly; therefore, the 1,269 is divisible by 3.

  4. Divisible by 5 • A number is divisible by 5, if it ends in a 0 or 5. • Examples: 25 300 1,250 22,585

  5. Divisible by 6: • A number is divisible by 6, if it is divisible by 2 AND 3. Examples: 96 divisible by 2 divisible by 3 so, it is divisible by 6 1,266

  6. Divisible by 9: • A number is divisible by 9, if the sum of the number’s digits is divisible by 9. • Example: 459 4 + 5 + 9 = 18 9 will go into 18 evenly; therefore 459 is divisible by 9.

  7. Divisible by 10: • A number is divisible by 10 if it ends in a 0. Examples: 100 720 8,980

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