Divisibility Quick Notes
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The document outlines rules for determining if a number is divisible by 2, 5, or 10. A number is divisible by 2 if it is even, ending in 0, 2, 4, 6, or 8. A number is divisible by 5 if it ends in 5 or 0. A number is divisible by 10 if it ends in 0. Examples and non-examples are provided to illustrate each rule.
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Divisibility Quick Notes
- 1. Rule for 2 A number is divisible by 2 if… The number is even Even numbers end in a 0, 2, 4, 6, or 8. Example: 18 is divisible by 2 because 18 is even. Non-example: 21 is not divisible by 2 because 21 is odd.
- 2. Rule for 5 A number is divisible by 5 if… The number ends in a 5 or 0 Example: 10 is divisible by 5 because it ends in a 0. Non-example: 12 is not divisible by 5 because it doesn’t end in a 5 or a 0.
- 3. Rule for 10 A number is divisible by 10 if… The number ends in a 0. Example: 90 is divisible by 10 because it ends in a 0. Non-example: 81 is not divisible by 10 because it doesn’t end in a 0.