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Everyone who says it's 1 is fucking retarded.
8/2(2+2) =/= 8/(2(2+2))
There's a reason Math is known as an EXACT SCIENCE. There's one and ONE way to read equations and formulas. You don't get to read them however you want and bend the rules as you see it fit. This isn't a psychological puzzle where the answer is to put the cube of ice next to a campfire instead of pouring water into it. No, there's only one way to solve this problem and if you get it wrong you're fucking wrong.
If you want to make the result 1, note the formula as 8/(2(2+2)) instead, so the entire divisor is solved beforehand thus resulting in 8/8.
What you're doing with 8/2(2+2) is showing 8/2 as a fraction, therefore it's a fraction multiplying a whole number. To make it easier, imagine the (2+2) being divided by a 1 to make the multiplication between fractions easier. It easily becomes 8(2+2)/2 and ends being 16.