DIVISIBILITY RULES. A number is divisible by: If... 6 9 10 the number ends in 0 the number is also divisible by 2 and 3 the sum of the number's digits.

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Presentation transcript:

DIVISIBILITY RULES

A number is divisible by: If the number ends in 0 the number is also divisible by 2 and 3 the sum of the number's digits is the number ends in 0, 2, 4, 6, or 8 the number ends in 0 or 5 the sum of the number's digits is divisible by 3 the number formed by its last two digits is divisible by 4

Dividing by 2 RULE: If a number ends in 0, 2, 4, 6, or 8, it is divisible by 2. Number Check the Division (Use the following page to show your work) According to the rule, should it be divisible by2? Yes What is the last digit?

Show your work on this page.

Dividing by 3 RULE: If the sum of a number's digits is divisible by 3, then the number itself is divisible by = 15 Yes Sum of the digits Number According to the rule, should it be divisible by 3? Check the Division (Use the following page to show your work)

Show your work on this page.

Dividing by 4 RULE: If the number formed by the last two digits is divisible by 4, then the number itself is divisible by Last two digits 128 Yes Number According to the rule, should it be divisible by 4? Check the Division (Use the following page to show your work)

Show your work on this page.

Dividing by 5 RULE: If a number ends in 0 or 5, then the number is divisible by What is the last digit? 2500 Yes Number According to the rule, should it be divisible by 5? Check the Division (Use the following page to show your work)

Show your work on this page.

Dividing by 6 RULE: If a number is divisible by 2 and 3, then it is also divisible by 6. Number According to the rule, should it be divisible by 6? Check the Division (Use the following page to show your work) Is the number divisible by 2 and 3? 258 Yes Yes

Show your work on this page.

Dividing by 9 RULE: If the sum of a number's digits is 9, then the number is divisible by Number According to the rule, should it be divisible by9? Check the Division (Use the following page to show your work) Sum of the digits =9 Yes

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Dividing by 10 RULE: If a number ends in 0, then it is divisible by What is the last digit? Yes Number According to the rule, should it be divisible by 10? Check the Division (Use the following page to show your work)

Show your work on this page.