💡𝚂𝗆𝖺𝗋𝗍𝗆𝖺𝗇 𝙰𝗉𝗉𝗌📱 @ SmartmanApps @programming.dev

Posts

22

Comments

591

Joined

2 yr. ago

people don’t really use the ÷ symbol in algebra beyond like 6th grade

Yes they do, just pick up a high school Maths textbook (in a country which uses obelus rather than colon).

And "Multiplication" refers literally to multiplication signs, of which there are none in this question.

Implicit multiplication is also multiplication

There's no such thing as implicit multiplication. The answer is 1.

This isn’t really one of the ambiguous ones but it’s fair to consider it unclear.

#MathsIsNeverAmbiguous if you follow all the rules of Maths (there's a lot of people here who aren't).

2(4) is not exactly same as 2x4

Correct! It's exactly the same as (2x4).

if you see a number butted up against an expression in parentheses you assume there is a multiplication symbol there

No, it means it's a Term (product). If a=2 and b=3, then axb=2x3, but ab=6.

I was taught 2(2+2)==2*(2+2)

2(2+2)==(2*(2+2)). More precisely, The Distributive Law says that 2(2+2)=(2x2+2x2).

It’s true you resolve what’s inside the parentheses first, giving you. 8÷2(4) or 8÷2x4.

Not "inside parenthesis" (Primary School, when there's no coefficient), "solve parentheses" (High School, The Distributive Law). Also 8÷2(4)=8÷(2x4) - prematurely removing brackets is how a lot of people end up with the wrong answer (you can't remove brackets unless there is only 1 term left inside).

Yes, it's The Distributive Law.

It already isn't an issue if people just follow all the rules of Maths.

Both of those Youtubes debunked in this thread.

A matter of convention: true

False. Actual rules of Maths

This is not one of the ambiguous ones

There aren't any ambiguous ones - #MathsIsNeverAmbiguous

not the math rules

If it involves Maths, then it's Maths rules.

It’s 16

It's 1

I’ll die on a hill that this is 16

Rest in peace

both you and people arguing that it’s 1 would be wrong

No, they're correct Order of operations thread index

This problem is stated ambiguously and implied multiplication

It's not ambiguous, there's no such thing as implicit multiplication

This is all matter of

...following the rules of Maths.

since 🐟 is no longer a number

It's still a pronumeral though, equal to 4, so the answer is still 8÷8=1.

There was 3 misinterpretations - see my reply to them.

confidently wrong on the internet

I made a hashtag for people #LoudlyNotUnderstandingThings :-)

They are order of operations

No, they're not.

Multiplication and division are not on the same level

Yes, they are.

they are distinct operations which form the identity when combined with a multiplication

In other words, they are the inverse operation of each other - welcome to why they have the same precedence.

order of ops is an established convention, not mathematical fact

It's a mathematical fact.

Under pemdas divisor operators must literally be completed after multiplication

Not literally. It's only a mnemonic, not the actual rules.

They are not of equal priority

Yes, they are. Binary operators have equal precedence, and unary operators have equal precedence.

it was decided that it would be easier to change how the equation was interpreted

No, it wasn't. The claim that the rules were changed is a debunked myth.