Division involves separating a quantity into equal groups or parts. While multiplication and division are related concepts, division undoes multiplication by taking a total quantity and separating it into equal groups to determine how many are in each group. Pictures can help illustrate division and show how it is the inverse of multiplication, but larger numbers require using factoring skills to successfully divide.

1. What is division?
division |diˈvi zh ən|
noun
1 the action of separating something into parts, or the
process of being separated.

2. Most people relate
division to
multiplication
This makes sense to grown ups.
But does it make sense to kids?

3. Why do people think that
multiplying and dividing go
together?
DOES THIS PICTURE SHOW 9 DIVIDED BY 3 OR 3 TIMES 9?

4. Beginning methods for
multiplication and division look
exactly the same.

5. The truth is
that division undoes
multiplication.
that division undoes
multiplication.
3x4 looks like this: ***
You know how many groups
and how many IN each group
it means you put 3 of
***
something together
4 times, you want to know
***
how many you will have
all together. ***

6. To do this backwards you start
with 12 of something.
***
***
***
***
and separate then into equal groups

7. This shows 12 separated into 4
equal groups of 3.
*** *** *** ***
12÷4=?
you know that The total number is 12, and that you
separate that into 4 groups. You want to know how
many in each group.

8. Easy with pictures right?
Not so easy with bigger numbers!
Not so easy with bigger numbers!
To successfully divide with bigger numbers,
you have to be able to take them apart. This is
where knowing that most numbers can be
factored by 2,3,5,7 and 10 really helps!

9. I bet you wanted to know about this one:
3 12
http://www.youtube.com/watch?v=hp6Mwm5Ouxclook
Now try this one:
Long Division using Chunking - YouTube

10. Everything we have been doing with factoring
and multiples builds the number knowledge
you need to divide more easily.