G.C.F

   Today I'm going to teach you greatest common factor.
So let's do the number 416.
the G.C.F. is let's see...
416=2 x 208; 208=2 x 104; 104=2 x 52; 52=2 x 26; 26=2 x 13.
count all of them up now and it's 10.
ssssso bye!

Mean, Median, Range, and Mode:)

so let me tell you about M.M.R.M. or Mean, Median, Range, and Mode.
so here are the numbers for our example...
15, 9, 17, 23, 44, 3.
So here's how you do mode.
you add 15+9+17+23+44+3=111, then you divide it by how many you have. 111/6=18.5
so the mode is 18.5.

now the median's turn...

So what you do is find the middle number and that's it basically, but you have to put it in order so it's
3,9,15,17,23,44, then your middle number is 15 or 17.
so the Median is 15/17.

now for range...

to do the range you do the biggest number minus the smallest one, so it's 44-3=41

So the range is 41

Last is the Mode...
the mode is were you find the most of the same numbers, so it would be all!


so the Mean is 18.5
the Median is 15/17
the Range is 41
and the Mode is all the numbers!!!

prime and composite!!!

P and C is a little tricky to me but I'll show you all I know...
here's how you tell it's prime: it can only divide by 1 and it's self.
here's how you tell it's composite: it can divide by 2 or more pairs like say it's 6, it can divide by 1,2,3, and 6. So the pairs are: 1 and 6, and 2 and 3.


Here's some questions...

Is 11 prime or composite?
it's prime.
Is 81 prime or composite?
composite, by: 1,9, and 81.
 Oh ya I forgot that if it's like 9 it's still composite because it has 3x3 in it but it would just look like this 1,3, and 9.
so that's it, see ya later!!!

Area and Perimeter

so because we just learned about shapes I'm going to tell you about area and perimeter.

so here's the question...

(It wont let me go below the picture)

So let's do perimeter 1st...

since it's a rectangle you add 55+55=110, then you add 62+62=124

last add 110+124=234

So it's 234ft

 

 

Now area's turn...

so it's basically multiplying 62x55= 3410

so it's 3410ft

 

$$$!!!

now we're doing money!!!

say we are at the store and a doll cost $4.26 and you gave $20.00.
how much would you  have left?

so just subtract!

$20.00-$4.26=$15.74

so you have $15.74 left over!

shapes 3-12

hey I'm going to show you all the shapes from 3 to 12 sides, now let me tell you about it...

3= triangle
4=square
5=pentagon
6=hexagon
7=heptagon
8=octagon
9=nonagon
10=decagon
11=hendecagon
12=dodecagon

so that's all the 9 of them!

word problems

You have 20 cookies and you have 7 friends you want to give it to, but you want 4 to your self. How many do you give your friends?

so 1st you take away the 4 cookies

20-4=16

2nd, divide 16 by 7

16/7=2.7

so it's 2.8