Thursday, April 20, 2006

Time to kill = Time to catch up

HELLO PEOPLE!It's been a while since I think ANYONE got on this site to make a post and no, I don't blame Mrs. Armstrong, she has enough on her mind. And I think we should be responsible enough to be able to take care of this. I mean,this is for our good.
ANYWAY..BACK TO Math. In my next posts, im going to TRY and catch up to what we did. aights?kk. be ryt back, preparing my notes.

Number 1

What we are doing in math now is solving EQUATIONS.
now. the question is not "What's the answer", "it's what's the value of X?"

let's say we have an equation where the ask us to find the VALUE of the variable X.

let's say we have..

"12 = 1 + x"

now the question is what is the value of x?
now take a look at the equation. looks hard? well. visualize this.
it's on a see-saw kind of thing. the "=" sign is the middle of it.
the numbers are the things on either side.
in algebra tiles, this is what it would look like.


now. The balance is "Balanced" meaning whatever is one the left side,
is equal to whatever is on the right side.
now. To get the value of X. The objective here is. ISOLATE the VARIABLE.
how do we do that? We take off whatever is with the "X"
now we cant just take it away. We need to take it away using Zero models.
to make a Zero Model with (+1) we need to add it's opposite to it. so we add (-1) to make it a Zero-Model. But there's a rule for it. to keep the two sides balanced, we need to do the same thing we did to the other side.
so if wee added a (-1) to one side, we add (-1) to the other one too.
now.
our question is now
"12 = 1 + x"
we already know how to make zero models. so to get the "X" by itself, we need to delete the (+1)
near it. (by making zero models of course.)

so our equation now goes, +12 -1 = 1 -1 + x
notice that i added a -1 to both sides. this is to KEEP IT BALANCED.
this is what it would look like on algebra tiles.

now that we cancelled out the +1 on the side with the variable. the is nothing with the variable.
now that equation reads..
11 = x

there, we found out what "x" is equal to.

that's basically how you do it. but that's only with addition & subtraction.
if the equation was,

"12 = x - 1"

you would still make zero models to isolate the variable x.

12 +1 = x -1 +1

the zero model on the side where the X is cancels out the "-1 and leaves nothing but the variable X behind. now, on the other side of the equals sign, we did the same thing to keep the balance.
because we added on (+1) to the side with "X" we have to add (+1) to the side with the numbers in it too. JUST TO KEEP IT BALANCED.
the result would be..

13 = x

there, i have finshed my post on that part. i'll be posting the next part shortly. the one abou multiplication and division.

10 Comments:

At 8:13 PM, Blogger Mr. H said...

This is an impressive post and exceptional when you think that you took it upon yourself start scribing on your own. keep on doing such excellent work.

Mr. Harbeck
Sargent Park School

 
At 8:23 PM, Blogger Arvin A. said...

thanks a lot mr. h, i loove good comments. hope my friends like my post. ADIOS!

 
At 12:27 AM, Blogger Danny T said...

ADIOS? what! Well good job

 
At 8:54 PM, Blogger George said...

good job arvin :P

 
At 5:37 PM, Anonymous Athryn McFayne(Dal) said...

Heheheheheheh (sighs) I can't make a blog for some dumb reason!well since dinh hasen't made any posts in four or five days i mine as well do what he didn't do!

Starting five days ago we started to look at the Multiplication rules for divisional equations(4x=20),the division rules for multiplicatoinal equations(4/x=5),and learned how to mix it up.I.e.,
4x-5=15,4/x+6=11,we learned how to do duel sided equations.I.e.,4x-5=3x-9,4/x+6=5/x-7,and recently we learned how to deal with braketed equations.4(x-7)=5(x-0),5r(9d-0)=-4f(8r+5).I don't have alot of time so I won't be able to show you how, but Uyen will show you how tomorrow!OK bye.

 
At 4:56 PM, Blogger Miss Nicholson said...

Wow Arvin! I'm impressed! Thinking about becoming a math teacher one day?? :) You explained yourself very well and the pictures that you used really enhanced what you said. Keep it up!

By the way, thanks for all the friendly hellos in the hallway!

 
At 10:37 PM, Blogger Mr. Kuropatwa said...

Hi Arvin,

Fantastic scribe post. I thought you might like to know that Mr. H. (comment #1 above) has nominated this post for the The Scribe Post Hall Of Fame.

Congradulations!!

 
At 11:00 PM, Anonymous Anonymous said...

:> just makeing an apperence good job lol! i'm pretty late eh? lol sry i dont pay attention to stuff mostly lol well c ya'll
take care
-ateh Ce Ce

 
At 11:39 AM, Blogger Weezie said...

Just thought you should know that when you subtract 1 from x + 1 and 12 it should be x = 11 not 13 :)

 
At 11:41 AM, Blogger Weezie said...

Oops sorry...read it wrong. You got 12 :)

 

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