Advanced search

Get £10 off your first lesson with Mumsnet-Rated tutoring service Tutorful here

method of long division for 8 yr olds?

(20 Posts)
triplets Wed 24-May-06 17:17:14

Before I ask their teacher I`ll ask you! How do 8yr olds do long addition or subtraction these days. We are told not to show them to put one number under another, no carrying numbers etc. This weeks homework was number reversals, 85+ 58, those numbers are too high for them to use their number square, they said they have to draw a line from the 8 to the second 5, add them, then the 5 to the second 8, add them and that gives the answer, but it doesn`t! That would be 13+13=26! Answer is 143, help!!!!!!!!!

EducatingMinds Wed 24-May-06 17:20:00

give me til 7:30 when kids are in bed and if no one comes back to you i will....

charliecat Wed 24-May-06 17:25:23

I was off school the week they did long division so this will be a great help to me too

EducatingMinds Wed 24-May-06 17:26:37

just re-read the title...long division or long addition

can help with both

Katymac Wed 24-May-06 17:30:56

8+5 is tens so 80+50 =130

5+8 is units so 5+8=13

130 + 13 is 143

Does that help?

fullmoonfiend Wed 24-May-06 17:34:23

Will be watching this thread withinterest - at the momy 8-yr-old is teaching me how to do it..

singersgirl Wed 24-May-06 18:37:11

That is how DS1 is doing it in y3, adding 10s and units separately, and then adding them together. Seems a bit long-winded to me, but I guess that is how I do it mentally.

popsycal Wed 24-May-06 18:39:09

OK I am back.....

The 'new' methods are basically more in line with mental methods which encourage children to understand what they are doing rather than simply 'doing a sum' and not really understanding the maths behind it.

Was it addition that you needed?
Any other requests

LIZS Wed 24-May-06 18:42:39

ds is yr 3 and not doing long division but is doing column addition and subtraction

popsycal Wed 24-May-06 18:42:48

every parents should have this site bookmarked!
fantastic help sheets!

triplets Wed 24-May-06 21:53:13

Right I am here to be taught! Yes it is long addition please.

triplets Wed 24-May-06 22:01:24

Just looked at that site and save it on favourites, very useful. Just called husband to lok and he siad oh its too late to be looking at that sort of thing at this time of nighjt, so helpful aren`t they? And him an engineer!

EducatingMinds Thu 25-May-06 19:35:00

did that website exoplain everything you needed to know?

grumpyfrumpy Thu 25-May-06 20:57:45

Message withdrawn at poster's request.

cat64 Thu 25-May-06 21:31:04

Message withdrawn

Katymac Thu 25-May-06 21:32:20

Can anyone tell me if what I suggested is right?

singersgirl Thu 25-May-06 22:45:04

I do understand, because I do remember as a child suddenly realising what all that carrying was about, several years after I'd been doing it accurately by rote. When I was small they taught column addition very early, around 5 or 6.

popsycal Fri 26-May-06 18:21:01

It has changed (and not that recently - probably around 5 years ago or so) to help children to actually understand what they are doing rather than go through the following vertical sum:

'do the units first. 3 add 8 that's 11. put 1 in the answer box and carry the one. 5 add 3 add the one on the doorstep. that's 9. that makes 91'

they don't have to understand much maths at all to be able to do that - simply remember an alogorithm.

the newer methods using a number line build on what children do in their heads anyway and use 'real numbers'
Just looked back at the opening post.
your 8 year old is being taught partitioning - although she should be saying 85+58
draw a line between the 80 and the 50. add them together - 130. draw a line between the 5 and the 8. that's 13. 130 +13 is 143'

does that make sense or have I had too long a week

popsycal Fri 26-May-06 18:21:29

so katymac is right yes

Katymac Fri 26-May-06 19:17:35

Thank goodness I was stating to doubt myself...

Join the discussion

Registering is free, easy, and means you can join in the discussion, watch threads, get discounts, win prizes and lots more.

Register now »

Already registered? Log in with: