# Mumsnet Talk

## To have wanted to alter this maths display

(36 Posts)
Fri 05-Oct-12 22:25:01

Was in a year 6 class today doing supply. Looked at the displays up and one of them was clearly wrong. It was the BIDMAS display but the teacher had done it as BI*MD*AS. With the meaning of the letters next to it. Schools will teach it as BIDMAS - and it does make a difference.

But how do you point out a mistake to a professional colleague at a school you want to go back to?

Notafoodbabyanymore Sat 06-Oct-12 10:50:58

It was BIMDAS for us in Australia. As others have pointed out, it doesn't actually matter which way around the M and D are anyway.

Himalaya Sat 06-Oct-12 08:50:13

Thinking about starting a baby names thread - "which do you prefer Bodmas or Sohcahtoa?"

Sat 06-Oct-12 08:39:02

Ooops - sorry - didn't see you replaced the O with a P!!

Himalaya Sat 06-Oct-12 08:27:29

Kim - I know, but P for power makes more sense than I for Integer or O for order - I could never remember what that was supposed to stand for... Although powers are intuitively something to do early on.

Sat 06-Oct-12 08:21:27

himalaya - B & P mean the same thing - brackets or parentheses.

Soupqueen Fri 05-Oct-12 23:56:49

Nothing really useful to add, but as a child who really struggled with maths, I would have found that abbreviation so useful. My higher maths was achieved more through stubbornness than understanding.....

Himalaya Fri 05-Oct-12 23:06:56

Shouldnt it be BPMDAS?!?

ExitPursuedByAaaaaarGhoul Fri 05-Oct-12 22:52:23

<scream>

Fri 05-Oct-12 22:52:18

I did kind of think when I wrote down "sum". Honest

Apparently (according to Wiki) New Zealand uses PEMA to emphasise the equal importance of multiplication and division, then addition and subtraction.

Such an advanced country compared to ours

Finbert Fri 05-Oct-12 22:50:14

woffling just what I was going to say

Fri 05-Oct-12 22:48:51

If we're being maths nerds

But calculation is such a long word!!!

WofflingOn Fri 05-Oct-12 22:47:38

'depending on what comes first in the sum'

Don't you mean calculation, kim?
If we are being maths nerds...

BoneyBackJefferson Fri 05-Oct-12 22:46:55

It is nice to sing from the same hymn sheet, but I taught a child who prefered
Excuse
My
Dear
Aunt
Sally

Fri 05-Oct-12 22:46:36

I also teach secondary maths.

I feel a bit for the teacher with the dodgy Czech translation. I teach a fair few students with very, very little English, and I put quite a lot of stuff through Google translate. I realise it's dodgy, but hopefully less dodgy than my grasp of Lithuanian or Tagalog.

vodkaanddietirnbru Fri 05-Oct-12 22:45:58

maybe they've changed it too to match up with the primary school - how do you know how they currently teach it? A lot has changed since I was at school too.

ja9 Fri 05-Oct-12 22:45:26

I was taught

B bless
M my
D dear
A aunt
S sally

.... So M before D...

Fri 05-Oct-12 22:43:46

Does it really matter? Now that's a good question. Secondary schools teach the acronym as BIDMAS or BODMAS. It's nice to sing from the same hymn sheet.

vodkaanddietirnbru Fri 05-Oct-12 22:42:01

does it really matter as long as they get the operations in the right order and get the right answer?

vodkaanddietirnbru Fri 05-Oct-12 22:41:08

I'm sure we did BOMDAS (Scotland, many years ago)

Fri 05-Oct-12 22:40:30

It was not incorrect - but it was not the standard acronym taught in UK schools.

Fri 05-Oct-12 22:39:41

Interesting - the USA uses PEMDAS, Canada uses BEDMAS and the UK is BODMAS or BIDMAS

BoneyBackJefferson Fri 05-Oct-12 22:37:40

Oh and BEDMAS

vodkaanddietirnbru Fri 05-Oct-12 22:37:39

Division and multiplication are of equal importance rather than having to be done in a particular order. The same is true of addition and subtraction. You do them in the order you find them rather than have to do division first and then multiplication/addition then subtraction. If the multiplication came first when working left to right then you would do the multiplication before carrying on to the next part of the sum. What was on the wall was therefore not incorrect.

www.bbc.co.uk/schools/ks3bitesize/maths/number/order_operation/revise2.shtml

Fri 05-Oct-12 22:37:17

4 divided by 2 x 3 = 2 x 3 = 6

Not 4 divided by 6

4 x 3 divided by 2 = 12 divided by 2 = 6

But it could also be 4 x 1 1/2 which also = 6 (the 1 1/2 comes from 3/2)

It is traditionally taught as BIDMAS / BODMAS

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