Maths Problem - Can you figure it out?

[calnorth]

May 26, 2016 20:32:38 GMT VapingBad said:

May 26, 2016 20:25:25 GMT calnorth said:

You'd better explain because those using their calculators are wondering.  the 9 minus 10 bit

Your sub line is totally wrong.

I thought it was clear, but maybe this will help.

The calculator I asked about....clarification of result when 10 is subtracted from 9.  Any explanation?

[erik514]

9 - 10 = -1

[Bobsbeer]

Very magnanimous of you Postmodern Smoking. Well done to mikedidthis. .

[VapingBad]

May 26, 2016 20:52:41 GMT calnorth said:

May 26, 2016 20:32:38 GMT VapingBad said:

Your sub line is totally wrong.

I thought it was clear, but maybe this will help.

The calculator I asked about....clarification of result when 10 is subtracted from 9.  Any explanation?

There is no 10, only the middle term is subtracted and that equals 9, the last term, the 1, is added.

[Bobsbeer]

For those puzzled by the answer, then this video will explain it.

[gill2009]

  Off to google BODMAS...I've never heard of it >>>>>>>>

[Bob]

May 26, 2016 20:49:22 GMT VapingBad said:

First I've heard of BODMAS, but I have understood it for as long as I can remember, maybe they didn't us it in the 70s and 80s.

They make Acronyms for everything these days, confuses the hell out of us oldies, we just used to use the actual words back in the 50s & 60s, the same goes for "TXT SPK" 

[djs]

BODMAS?

I remember MAFS (Maths, innit) & I remember BOD. He was an annoying little thing at the best of times.

not quite as annoying as the Teletubbies, in fairness.

[djs]

May 27, 2016 9:49:27 GMT Bob said:

They make Acronyms for everything these days, confuses the hell out of us oldies, we just used to use the actual words back in the 50s & 60s, the same goes for "TXT SPK" 

They sure do. TTFN. WYSIWYG. KISS.

[Greg]

May 27, 2016 9:19:15 GMT gill2009 said:

  Off to google BODMAS...I've never heard of it >>>>>>>>

If only you'd gone to grammar school 

[gill2009]

May 27, 2016 15:47:57 GMT Greg said:

May 27, 2016 9:19:15 GMT gill2009 said:

  Off to google BODMAS...I've never heard of it >>>>>>>>

If only you'd gone to grammar school 

  Ah, but what I do know, I am very good at 

[Greg]

May 27, 2016 15:52:27 GMT gill2009 said:

May 27, 2016 15:47:57 GMT Greg said:

If only you'd gone to grammar school 

  Ah, but what I do know, I am very good at 

With a heart of gold 

[dave]

Very entertaining thread (I used to teach Maths ) I must admit I never came across BODMAS (or BIDMAS as it is also often called) when I was at school, but we did learn about the priorities of arithmetic operators. One thing to be careful of when applying it though is that division and multiplication have equal priority as do addition and subtraction - you determine which of them to do first by working from left to right. For instance 5-2+3 would be 0 if you followed the BODMAS rule exactly, but the correct answer is 6 as you will find if you enter it into a calculator.

My grandson came up with another one of these acronyms when I was helping him out on his GCSE trigonometry. It was SOHCAHTOA - I'd never heard of that either! I've since discovered another version of that which I think is much better "Some Old Hag Cracked All Her Teeth On Apples"