@denki @hayalci @fortyseven @clement_la_baleine @schmutzie
"If highschool mathematics is at odds with ordinary mathematics" - it isn't. I never said it was. I only said University people have forgotten how to do a Year 8 Maths problem. My thread clearly states that , and
You're just throwing Strawmans at me now. We're done. Bye now.

#mathsisneverambiguous #dontforgetdistribution

Last updated 1 year ago

1/4
Now we'll tie the previous 2 rules together and see why order of operations means provided you

Start with 1, also the result of any number divided by itself, so let's write 8/8

We can factorise, and 8 is even, so let's take out a 2, 8/2(4)

We can rewrite the stuff in brackets without changing the answer, so let's write 8/2(1+3)

I started with 1,so we have to make sure the rules of get us back there...

#mathsmonday #math #mathematics #mathsisneverambiguous #dontforgetdistribution #maths

Last updated 1 year ago

@DevWouter @mattgoldman both got the correct answer of 1 - well done! Let's look at the correct working out, then delve into where people go wrong with their

8/2(1+3)
=8/(2*1+2*3)
=8/(2+6)
=8/8
=1

Also acceptable is...
8/2(1+3)
=8/2(4)
=8/(2*4)
=8/8
=1

If you've seen someone say that it's ambiguous, it isn't - we shall see in coming weeks that they have simply forgotten one or more rules

First, the Distributive Law...

#maths #math #mathsisneverambiguous #mathematics #dontforgetdistribution

Last updated 1 year ago