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[–] • 8 pts

The equation is ambiguous & calls into question the order of operations. The proper use of parentheses would clear things up.

[–] • 8 pts

It's not amiguous at all.

[–] • 1 pt

I am by far a math nerd, but I agree with you.

[–] • 0 pt
[–] • 0 pt

That's what common core teaches, not mathematics.

[–] • 4 pts

Nope, the equation is correct according to the order of operations rule.

I missed it myself the first time, too.

[–] • 1 pt

True. I recall a similar post some time ago that sparked a conversation about the order of operations. I did a quick search and didn't find what I was thinking of, so maybe I'm mistaken. It boiled down to some not using PEMDAS correctly.

If I'm taking a note for later I'll write something like this as 230 - (220 * 0.5) just to make sure I don't trip myself by not looking close.

[–] • 1 pt

I'll give you a hint: Read it even more closely.

(There's also a spoiler in the comments.)

[–] • 0 pt

It's ambiguous because typography makes it unclear if it's 230 - 220 x (1/2) or (230 - 220 x 1) / 2

[–] • 0 pt

I remember this from grade school: PEMDAS!

[–] • 0 pt

multiplication and division always occur before add and subtract.