Thursday, November 12, 2009

Extra Credit

So we learned the divisibility rules for 2, 3, 4, 5, 6, 9, and 10.

Extra credit to the first person to find and post the rules for 7 and 8!


Why do you think I didn't teach you the rules for 7 and 8?
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12 comments:

  1. UnknownNovember 12, 2009 at 5:06 PM

    the divisabilaty rule for 7 is that it shall be a maltiple of. The divisabilaty of 8 is if can be 2 four tims

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  2. UnknownNovember 12, 2009 at 5:07 PM

    my emaili miluis.luis@gmail.com so mail me

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  3. Mr. BorenerNovember 12, 2009 at 5:25 PM

    Micheal...Google divisibility rule for 7

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  4. UnknownNovember 13, 2009 at 1:56 PM

    the divisibility rule for 7 is Form the alternating sum of blocks of three from right to left Subtract 2 times the last digit from the rest.Or, add 5 times the last digit to the rest.

    and the divisibility rule for 8 is If the hundreds digit is even, examine the number formed by the last two digits. If the hundreds digit is odd, examine the number obtained by the last two digits plus 4.

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  5. UnknownNovember 13, 2009 at 5:54 PM

    This comment has been removed by the author.

    ReplyDelete
  6. UnknownNovember 13, 2009 at 9:41 PM

    Is 348 divisible by 7?

    Remove the last digit, which is 8. The number becomes 34. Then, Double 8 to get 16 and subtract 16 from 34.

    34 − 16 = 18 and 18 is not divisible by 7. Therefore, 348 is not divisible by 7

    Is 37961 divisible by 7?

    Remove the last digit, which is 1. The number becomes 3796. Then, Double 1 to get 2 and subtract 2 from 3796.

    3796 − 2 = 3794, so still too big? Thus repeat the process.

    Remove the last digit, which is 4. The number becomes 379. Then, Double 4 to get 8 and subtract 8 from 379.

    379 − 8 = 371, so still too big? Thus repeat the process.

    Remove the last digit, which is 1. The number becomes 37. Then, Double 1 to get 2 and subtract 2 from 37.

    37 − 2 = 35 and 35 is divisible by 7. Therefore, 37961 is divisible by 7.

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  7. UnknownNovember 13, 2009 at 9:41 PM

    number is divisible by 8 if the number represented by its last three digits is divisible by 8.

    For instance, 587320 is divisible by 8 because 320 is divisible by 8.

    ReplyDelete
  8. UnknownNovember 13, 2009 at 9:44 PM

    Guys cheack out teachertube.com and look for a man singin fraction he shows how to fix inproper fractions the one who sings is mr..duey it also rymes check it out

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  9. AnonymousNovember 14, 2009 at 10:23 AM

    o_o >.>

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  10. NathalieNovember 15, 2009 at 8:16 AM

    i dont understand the homework

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  11. Mr. BorenerNovember 15, 2009 at 9:58 AM

    Nice Jenny! So why do you think I didn't teach the rules for 7 and 8?

    ReplyDelete
  12. Mr. BorenerNovember 15, 2009 at 9:59 AM

    Nathalie the homework is just to give a number sentence example for each property.

    Example:

    Commutative Property: 3 + 5 = 5 + 3

    If you have any more questions e-mail me: bborener@hotmail.com

    ReplyDelete

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