Twins

I have a twin sister. We share everything, but sometimes when we share things, it doesn’t come out even. She gets more than me. I wonder why that happens.

wpe50.jpg (9774 bytes)

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Look at these marbles. Will my sister and I get the same number of marbles?
wpe5F.jpg (10864 bytes)

     wpeD.jpg (782 bytes)

     wpeB.jpg (833 bytes)

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wpe62.jpg (9301 bytes)








 

We found that if numbers  make pairs, we can share them evenly. We call these even numbers.

 

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  Mine Sister's Left over Even or Odd
2 WB01543_.GIF (723 bytes) WB01543_.GIF (723 bytes)  

even

4 WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes) WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes)  

even

6 WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes) WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes)  

even








 

All numbers that make pairs but have 1 left over are called odd numbers.

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  Mine Sister's Left over Even or Odd
1     WB01543_.GIF (723 bytes) odd
3 WB01543_.GIF (723 bytes) WB01543_.GIF (723 bytes) WB01543_.GIF (723 bytes) odd
5 WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes) WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes) WB01543_.GIF (723 bytes) odd
7 WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes) WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes)WB01543_.GIF (723 bytes) WB01543_.GIF (723 bytes) odd








 

Click only the even numbers on this chart.

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Odd Even
1 2
3 4
5 6
7 8
9 10

                AG00085_.GIF (503 bytes)
Even numbers are used when counting by 2s.

 








 

Are these numbers odd or even? Click the word that tells about each number.

 

68 wpe12.jpg (1383 bytes) wpe17.jpg (1301 bytes)
41 wpe12.jpg (1383 bytes) wpe17.jpg (1301 bytes)
25 wpe12.jpg (1383 bytes) wpe17.jpg (1301 bytes)
70 wpe12.jpg (1383 bytes) wpe17.jpg (1301 bytes)
Click on the marble to get a hint.

 

wpeE.jpg (2408 bytes)

 

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Now that we know about odd and even numbers by looking at pairs and by counting by 2s, let’s look at some really large numbers.

436,973,751

Wow! That is a really big  number. Is it odd or even?

wpe2E.jpg (1383 bytes)

wpe2D.jpg (1301 bytes)

wpe2C.jpg (1354 bytes)

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No matter how large or small the number, we can look at the digit in the ones place to know if the whole number is odd or even.
Odd Even
1 2
3 4
5 6
7 8
9 10

4,927 

               AG00085_1.GIF (503 bytes)

The 7 in the ones place is odd so the whole number is odd.


wpe35.jpg (9433 bytes)
I think I've got it!
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Let’s practice a few more just to be sure we can tell if a number is odd or even.
3,089 wpe37.jpg (1383 bytes) wpe36.jpg (1301 bytes)
22 wpe37.jpg (1383 bytes) wpe36.jpg (1301 bytes)
64,241 wpe37.jpg (1383 bytes) wpe36.jpg (1301 bytes)
907 wpe37.jpg (1383 bytes) wpe36.jpg (1301 bytes)
5,300 wpe37.jpg (1383 bytes) wpe36.jpg (1301 bytes)







wpeB.jpg (1354 bytes)


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There are two of us so we are an even number.

 

 

 

wpeD.jpg (9711 bytes)

BUT

There’s only one of you.  Are you odd?

AG00261_.GIF (7557 bytes)

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