## "3 tens 4 ones" questions

### "3 tens 4 ones" questions

3 tens 4 ones = ?
5 tens 2 ones = __ ones

I used poker chips (yes, poker chips with "10" and "1" imprints) and try explaining to him.

He seem to understand but I have a feeling that he is just looking at the surface of understanding.

It seems to me that he understands it by (italics is his thinking):

3 tens 4 ones = (OK... I just write "3" and "4", correct!)
5 tens 2 ones = __ ones (I just write "5" and "2", correct!)

He doesn't seem to understand the concept of a group of tens and a group of ones, etc.

Anyone has anyway to help?

nkthen
OrangeBelt

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### Re: "3 tens 4 ones" questions

Maybe u can try asking him.. what is 3 tens? If he can answer 3 tens = 3 groups of ten= 30, and similarly 4 ones =4, then we know he can understand tens and ones.
3tens 4 ones = 30 + 4 =34

PiggyLalala
KiasuGrandMaster

Posts: 4013
Joined: Tue May 24, 2011 8:11 pm
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### Re: "3 tens 4 ones" questions

3 tens 4 ones = ?
5 tens 2 ones = __ ones

I used poker chips (yes, poker chips with "10" and "1" imprints) and try explaining to him.

He seem to understand but I have a feeling that he is just looking at the surface of understanding.

It seems to me that he understands it by (italics is his thinking):

3 tens 4 ones = (OK... I just write "3" and "4", correct!)
5 tens 2 ones = __ ones (I just write "5" and "2", correct!)

Chips with imprint of 10 doesn't help.
They need to see that 10 ones =1 ten.
So get 10 one chips and stick them together so he understands quantity. Not just a number that represents quantity. Representation makes sense only after the child has grasped the concept of quantity well.

You can check out the Montessori material. Or simply get beads and string 10 . That way you can show how one ten bar can be split up into 10 ones .

Hope my explanation is not confusing.

He doesn't seem to understand the concept of a group of tens and a group of ones, etc.

Anyone has anyway to help?

Sun_2010
KiasuGrandMaster

Posts: 4613
Joined: Mon Feb 22, 2010 2:13 pm
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### Re: "3 tens 4 ones" questions

Use lego blocks....each lego block represents "1". Make a "10" with 10 blocks. Before showing him the "10", get him to build groups of smaller numbers like "3", "6" and "9". From there he can easily see a group of "10"=10 "1"s.

Subsequently, you can use the lego blocks to teach him addition and subtraction, things like "carrying over" and "borrowing".

Good luck!

Mummy_Jay
KiasuNewbie

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### Re: "3 tens 4 ones" questions

I USE ICE CREAM STICKS

tie 10 with a rubber band, to be the "ten"

KiasuNewbie

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### Re: "3 tens 4 ones" questions

You may try getting this from The Learning Store

It helps to explain the concept clearer.

learningstore
BrownBelt

Posts: 694
Joined: Mon Aug 17, 2009 2:39 pm
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### Re: "3 tens 4 ones" questions

Does he like money?

Use the 10 cent coins and 1 cent coins to teach him, then you can teach this concept and money at the same time.

1 cent coins quite useless these days, so might as well turn it into teaching resources.
Guest

### Re: "3 tens 4 ones" questions

ksi wrote:Does he like money?

Use the 10 cent coins and 1 cent coins to teach him, then you can teach this concept and money at the same time.

1 cent coins quite useless these days, so might as well turn it into teaching resources.

You can use the below too:) to demonstrate money concepts

learningstore
BrownBelt

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### Re: "3 tens 4 ones" questions

nkthen wrote:...It seems to me that he understands it by (italics is his thinking):

3 tens 4 ones = (OK... I just write "3" and "4", correct!)
5 tens 2 ones = __ ones (I just write "5" and "2", correct!)

He doesn't seem to understand the concept of a group of tens and a group of ones, etc.
...

Apart from using ice-cream sticks and coins, you can also test what you suspect his "thinking" is, by asking him questions like:

What is 3 tens Plus 11 ones?

If he is thinking the right way, he will compose 1 ten 1 one from the 11 ones, then add the tens.

nansk
BrownBelt

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### Re: "3 tens 4 ones" questions

I found putting it into columns helped my daughter. Draw three columns - hundreds, tens and ones then put the numbers in the correct columns. She's in P2 now so they are doing 3 digit numbers but the principle is the same.

nms1
BlackBelt

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