Where can i learn about Thousands, Hundreds, Tens and Units

burtons

Sorry If this is in the wrong section but I didn't know where to put it.



My 7 year old daughter's homework for this week is adding and halving numbers but I've forgotten how to use thousands, hundreds, tens and units so is there anywhere online I can refresh my memory. She has to half 72, 646 and 1428 but I'm not sure if I'm doing it correctly and if I am I don't know how to explain to her how I got the answer.

Here is an example how it has to be done.
72
/ \
70 2
| |
35 1
\ /
36


646
/ \
64 6
| |
32 3
\ /
323




1424
/ \
14 24
| |
7 12
\ /
712

Bogalot

Have you looked at Google? There are hundreds of resources that will show you how to do this.

(Hopefully you've now done this rather than waiting for someone to answer.)

System

BBC Bitesize is a good place to look. You do right to ask because how they're taught today is different to how we were taught. When my son had difficulty with division I taught him the way I was taught and generations before me were and he got it straight away but his teacher marked him down because even though the answer was correct the method used was not the new trendy one they were taught which made no sense.

The irony was that when I went to uni in my 40s I ended up in a maths workshop teaching 18 year olds my son's age who had just passed A level maths how to do long division, so good was the trendy way my son was taught.

kingfisherblue

You shouldn't be getting the answer - your daughter should. If she's unsure of the method her teacher is using, ask for an example and ask her teacher to go over it again. It might be possible for you to see the teacher or TA after school (you and your daughter together) and have a mini lesson on the correct way to do this, so that you can support your daughter. However, if she gets the wrong answer, I wouldn't correct her - parents don't do their children any favours by giving them the right answers. Children learn by making mistakes (as do adults!). I would ask her to show me how she worked her answer out, though, both on correct answers and wrong ones.

Zeni

Hi, I currently teach year 3 (I'm assuming as she's seven shes either year 2 or year 3) so hope this can help you and your daughter
From the model you have given us it looks like your daughter is currently halving by first partitioning (breaking up) the numbers into thousands, hundreds, tens and units and then is halving these individually.
Your first step would be to partition the numbers - draw a simple place value grid on paper and write the number is halving in. This will clearly show her how to break the number up. E.g 646

Th H T U
__ 6 4 6

We can see this is 6 hundreds, 4 tens and 6 units. Then write this as you have above and halve the hundreds, halve the tens and halve the ones. (personally I would write them as the whole number so the child see that the '3' is 300)
6 4 6
/ I \
600 40 6
I I I
300 20 3

Finally your daughter should be then recombining the numbers back together 300 + 20 + 3 = 323.
If your in doubt ask your daughters class teacher for help - trust me they are always keen to see parents who want to help their children at home, and ask if they have a calculation policy you can see so you know the methods your daughters year group are using. (As different years have different methods sometimes parents know methods that are for older children and using these with them can sometimes confuse them as there not quite ready for that step yet).

jobbingmusician

Zeni wrote: »

Hi, I currently teach year 3 (I'm assuming as she's seven shes either year 2 or year 3) so hope this can help you and your daughter
From the model you have given us it looks like your daughter is currently halving by first partitioning (breaking up) the numbers into thousands, hundreds, tens and units and then is halving these individually.

Thank you so much, Zeni, but can we discuss this? I promise I am not posting to criticize your help, but rather to learn more. (I am interested and rather appalled at the new way of teaching, but I would like to understand it more.)

My problem is that this DOESN'T seem to be happening in the example above. I'd be rather happier if it were, although still worried about what's coming next (dividing by 3, 7 etc)

What it looks to me as if the teacher is doing in the examples s/he's given is looking for even numbers in the long number, then halving these. So .....

ah! I've just had a breakthrough. In the OP, 72 is the example and the other workings out are the parent's? In which case you are right, and I totally understand what is going on. (I thought they were all examples.)

burtons - is this right? The calculation which starts with 72 is the example, and the others are yours?

snozberry

the first example is partitioning. So, 72 is 70 + 2 (seven tens and two ones (the term 'units' is no longer used). Half of 70 is 35 and half of 2 is 1. When you recombine you get 35 + 1 = 72.

gettingtheresometime

kingfisherblue wrote: »

You shouldn't be getting the answer - your daughter should. If she's unsure of the method her teacher is using, ask for an example and ask her teacher to go over it again. It might be possible for you to see the teacher or TA after school (you and your daughter together) and have a mini lesson on the correct way to do this, so that you can support your daughter. However, if she gets the wrong answer, I wouldn't correct her - parents don't do their children any favours by giving them the right answers. Children learn by making mistakes (as do adults!). I would ask her to show me how she worked her answer out, though, both on correct answers and wrong ones.

But if the OP doesn't understand how the teacher is teaching the child something how on earth are they supposed to help the child?

I remember as a child getting upset as my teachers were teaching one way and my father was trying to help me using the way he was taught.

Yes we got to the same answer but when you don't understand the methodology using the first method, being taught a second way really doesn't help.

BrassicWoman

try the National Numeracy Challenge?

paddedjohn

Use the calculator on her mobile ��

xapprenticex

awww bless