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Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
Divisibility rules
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Divisibility rules

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Divisibility rules

Divisibility rules

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    • 1. Divisibility Rules How do we know when we can divide one number into another exactly?
    • 2. PPT File Name: F:TeachingNorth East Carolina Prep School2013 - 2014FourthMathLesson PlansDivisibility Rules PPT URL: http://tinyurl.com/powcp68 Notes URL: http://tinyurl.com/mmmx6l7
    • 3. Vocabulary Divide: sharing or grouping a number into equal parts Divisible: can be divided without a remainder Remainder: amount leftover after dividing a number
    • 4. More Vocabulary Quotient: the result of dividing one number by another (the answer) Even: divisible by two – Ends with: 0; 2; 4; 6; 8 Odd: not divisible by two – Ends with: 1; 3; 5; 7; 9
    • 5. More Vocabulary Sum: total or whole amount (answer when adding) Digit: symbol used to show a number – For example: 8; 16; 856
    • 6. Divisibility Rules (2) A number can be divided by 2 if the last digit is even – For example 52
    • 7. Divisibility Rules (3) a number is divisible by 3 if the sum of the digits is 3, 6 or 9 – For example • 36 – 3+6=9 – 9÷3=3
    • 8. Divisibility Rules (4) a number is divisible by 4 if the number made by the last two digits can be divided by 4
    • 9. Divisibility Rules (5) A number is divisible by 5 if the last digit is a 5 or a 0 – For example 7 5 – 9 0 –
    • 10. Divisibility Rules (6) A number can be divided by 6 if the last digit is even and the sum of all the digits is 3, 6 or 9 – For example • 126 – 1+2+6=9 – 9÷3=3
    • 11. Divisibility Rules (8) A number is divisible by 8 if the number made by the last three digits will be divisible by 8 – For example • 152 – 1+5+2=8 – 8÷8=1
    • 12. Divisibility Rules (9) A number is divisible by 9 if the sum of all the digits will add to 9
    • 13. Divisibility Rules (10) A number can be divided by 10 if the last digit is a 0 – For example • 6 0
    • 14. Divisibility Rules A number can be divided by 7 if ……………… can you find a rule?
    • 15. Divisibility Rules 2, the last digit will be an even number 3, all the digits will add to 3,6 or 9 4, the number made by the last two digits can be divided by 4 5, the last digit will be a 5 or 0
    • 16. Divisibility Rules 6, the last digit will be even and the digits will add to 3, 6 or 9 8, the number made by the last three digits will be divisible by 8
    • 17. Divisibility Rules 9, the sum of the digits will be 9 10, the last digit will be a 0 There is no easy test for 7, although some methods have been invented, however it is easier to use a pencil and paper method.
    • 18. Take the Quiz Take the Quiz http://www.softschools.com/quizzes/math/divisibility_rules/qui
    • 19. Divisibility Rules Apply these rules to theses numbers: 74,673,042 444,555,448 61,616,168 732,510 66,666,666 179,131,590

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