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"Naughty Number Nine" is a song in Schoolhouse Rock!, which can be seen in Multiplication Rock. The song teaches us how to multiply by nine.

Lyrics[]

Number nine will put you on the spot.
Number nine will tie you up, oh, in a knot.
When you're tryin',
Multiplyin' by nine,
You might give it everything you've got
And still be stopped.
If you don't know some secret way you can check on,
You'll break your neck on
Naughty number nine.

Now the first thing to keep in mind,
When you're multiplyin' by nine
Is that it's one less than ten.
You see, nine is the same as ten minus one.
So you could multiply your number by ten,
And then subtract the number from the result,
And you'd get the same product
As if you'd multiplied by nine.
And you knew it.

I mean, eight times nine is 80 minus eight,
And seven times nine is 70 minus seven,
And six times nine is 60 minus six.
You could use those tricks.
'Cause you must have some secret way you can beat it,
Or else you'll meet it
With naughty number nine.

Of course, it doesn't hurt
To know the table of nines by memory.
It goes like this:

One times nine is nine,
And two times nine is 18.
(Mean old number nine)
Three times nine is 27,
And four times nine is 36.
Five times nine is 45,
And six times nine is 54,
And seven times nine is 63.
Eight times nine is 72,
And nine times nine is 81,
And ten times nine is 90.

Now, the digit sum is always equal to nine.
I mean, if you add two and seven, the digits,
You'd get nine, the digit sum.
That's true of any product of nine.
If they don't add up, you've made a mistake.

'Cause you must have some secret way you can check it,
Or else you'll wreck it
With naughty, nasty, mean old number nine.

Trivia[]

  • The crew fought with the ABC Standards and Practices department to have Naughty Nine keep his cigar to show how "naughty" he was.
  • Voted #21 of the top 25 favorite Schoolhouse Rock! songs.


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Media
Schoolhouse Rock!Schoolhouse Rock Live!Schoolhouse Rock! 50th Anniversary Singalong
Songs
Schoolhouse Rocky
Multiplication: My Hero, ZeroElementary, My DearThree is a Magic NumberThe Four-Legged ZooReady or Not, Here I ComeI Got SixLucky Seven SampsonFigure EightNaughty Number NineThe Good ElevenLittle Twelvetoes
Grammar: Unpack Your AdjectivesLolly, Lolly, Lolly, Get Your Adverbs HereConjunction JunctionInterjections!Rufus Xavier SarsaparillaVerb: That's What's HappeningA Noun is a Person, Place or ThingBusy PrepositionsThe Tale of Mr. Morton
America: No More KingsFireworksThe Shot Heard 'Round the WorldThe PreambleElbow RoomThe Great American Melting PotMother NecessitySufferin' Till SuffrageI'm Just a BillThree Ring GovernmentI'm Gonna Send Your Vote to CollegePresidential Minute
Science: The Body MachineDo the CirculationElectricity, ElectricityThe Energy BluesInterplanet JanetTelegraph LineThem Not-So-Dry BonesA Victim of GravityThe Weather Show
Money: Dollars and Sense$7.50 Once a WeekWhere the Money GoesTax Man MaxWalkin' on Wall StreetThis for ThatTyrannosaurus DebtThe Check's in the Mail
Earth: Report from the North PoleThe Little Things We DoThe Trash Can BandYou Oughta Be Saving WaterThe RainforestSave the OceanFat Cat Blue: The Clean Rivers SongA Tiny Urban ZooSolar Power to the PeopleWindy and the WindmillsDon't Be a Carbon SasquatchThe Three R's
Scooter Computer and Mr. Chips
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