Monday, December 12, 2011
Sunday, December 11, 2011
Thursday, December 8, 2011
Wednesday, December 7, 2011
Tuesday, December 6, 2011
Monday, December 5, 2011
Monday, November 28, 2011
Saturday, November 26, 2011
Fraction
Let's break the hexagon into 6 equal pieces:
What if we just had one of the pieces? That would be 1 piece out of 6 pieces. Right?
Here's how we write it:
We read this like "one sixth."
Let's do some more counting!
Let's do some more counting!
.....
How much of this hexagon is red?5 pieces are red... out of 6 total pieces...
So, of the hexagon is red.
How much is blue?1 blue piece... out of 6...
of the hexagon is blue.
Friday, November 25, 2011
Thursday, November 17, 2011
Saturday, November 12, 2011
Division
Let's see what's really going on when we divide one number into another number.
We start with 6 triangles:
We want to see how many chunks of 3 we can make out of 6 things!
We can divide 6 things into 2 chunks of 3.
Now, let's see how many times 2 will go into 6.
Start with 6 squares:
We want to see how many chunks of 2 we can make out of 6 things!
We can divide 6 things into 3 chunks of 2.
We start with 6 triangles:
We want to see how many chunks of 3 we can make out of 6 things!
We can divide 6 things into 2 chunks of 3.
Now, let's see how many times 2 will go into 6.
Start with 6 squares:
We want to see how many chunks of 2 we can make out of 6 things!
We can divide 6 things into 3 chunks of 2.
Multiplication
Let's see what's really going on when we multiply two numbers.
This means that you have two groups of 3!
So, our answer is:
Let's do another one! This one has the numbers switched around.
This means that you have three groups of 2!
So, our answer is:
Hey, that's the same answer we got with 2 x 3! But, we put the six together a different way. Look at them both again to see the difference!
This means that you have two groups of 3!
Put the two groups together... How many triangles do you have?
Count them... One, two, three, four, five, six!So, our answer is:
Let's do another one! This one has the numbers switched around.
This means that you have three groups of 2!
Put the three groups together... How many squares do you have?
Count them... One, two, three, four, five, six!So, our answer is:
Hey, that's the same answer we got with 2 x 3! But, we put the six together a different way. Look at them both again to see the difference!
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