SereneSadie comments on I dunno

[+] SereneSadie -30 points 11 months ago (19 children)

Gonna keep shouting until it sticks;

Put a goddamn function sign for the parenthesis. Don't assume everyone just knows what to do with the parenthesis alone. Fml it bugs me every time this meme gets posted.

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[–] prole@lemmy.blahaj.zone 22 points 11 months ago (5 children)

What? A number next to parenthesis always means multiplication. Are people really not taught this anymore?

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[–] x4740N@lemmy.world 0 points 11 months ago* (3 children)

I live in Australia and don't recall my school at all teaching me this in maths class

They taught us stuff like radius and area of a circle but not this

Edit:

Also counterpoint, people exist that live in other countries and every countries education system is different

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[–] prole@lemmy.blahaj.zone 1 point 11 months ago (1 child)

I thought math was relatively universal. The US education system may be different, but I'm certain we're not the only place that does it that way.

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[–] SmartmanApps@programming.dev 0 points 11 months ago

I thought math was relatively universal

It is

The US education system may be different

They have the same rules, but they don't require Maths teachers to have a Maths qualification (in Australia you have to have a Masters), and they have been sliding in world rankings for more than a decade.

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[–] SmartmanApps@programming.dev 0 points 11 months ago

I live in Australia and don’t recall my school at all teaching me this in maths class

I'm in Australia, and I remember being taught it, and I teach it.

people exist that live in other countries and every countries education system is different

The rules are the same everywhere, only the notation varies (in Germany they use . for multiply and : for divide, and say "dot before slash", slash being - and +).

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[–] SmartmanApps@programming.dev 0 points 11 months ago

What? A number next to parenthesis always means multiplication

No, it means distribution, a(b+c)=(ab+ac)

Are people really not taught this anymore?

They're taught distribution yes. It's only adults who've forgotten the rules of Maths who get these wrong

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[–] Dekkia@this.doesnotcut.it 25 points 11 months ago (1 child)

Counterpoint:

If kids where taught how to solve them properly we wouldn't need to dumb down equasions.

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[–] SmartmanApps@programming.dev 0 points 11 months ago

If kids where taught how to solve them properly we wouldn’t need to dumb down equasions

They are taught how to solve them properly. It's only adults who've forgotten the rules of Maths who get them wrong

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[–] Natanox@discuss.tchncs.de 16 points 11 months ago (3 children)

Why should anyone do that, an implied multiplication is the normal thing you learn in (I think?) somewhere between 5th to 7th grade. You only add an operator if it's something else. It's as basic as PEMDAS.

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[–] SmartmanApps@programming.dev -1 points 11 months ago (2 children)

an implied multiplication

There's no such thing. It's a Term/Product.

is the normal thing you learn in (I think?) somewhere between 5th to 7th grade

Yes, you learn that it's a Term/Product in Year 7

You only add an operator if it’s something else

You never add an operator, or you end up with wrong answers.

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[–] Natanox@discuss.tchncs.de 0 points 11 months ago (1 child)

Aaah, got it. So if I see something like "5-(2+4)" I will just remove the subtraction operator and call it a day. Smartman on the internet said so. 🥴

Also casual reminder not everyone on the internet is a native english speaker. Everyone but you knew what was meant.

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[–] SmartmanApps@programming.dev -1 points 11 months ago

So if I see something like “5-(2+4)” I will just remove the subtraction operator and call it a day

Nope. Never said anything of the sort.

Smartman on the internet said so

No I didn't, but nice try at a strawman 😂

not everyone on the internet is a native english speaker. Everyone but you knew what was meant.

There is no such thing as "implied multiplication" in any language. They are called Terms/Products in whatever language that book is using.

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[–] kameecoding@lemmy.world 4 points 11 months ago (5 children)

Google implied multiplication.

Do you write 2x or do you write 2 • x?

That's implied multiplication, if x= (a+b) then 2x becomes 2(a+b). Implied multiplication

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[–] SmartmanApps@programming.dev -1 points 11 months ago* (4 children)

Google implied multiplication

There's no such thing. It's a Term/Product. Google is a prime source of Maths disinformation (yes, they have been told it's wrong, repeatedly, so it's disinformation).