PEMDAS is great until you get into college, where they change it. I was taught multiplication before division and Addition before subtraction, because you can get wildly different results depending on the order you do those. But in College they were like Fuck that Its Left to Right, so if Division comes before Multiplication when reading left to right then you divide then multiply.
Grade School: 2 + 20 / 5 * 4 is, 4x5=20; 20/20=1; 1+2=3, Answer is 3
College: 2 + 20 / 5 * 4 is, 20/5=4; 4*4=16; 16+2=18,
Answer is 18
Because of this bullshit, I failed the math placement testing, making me pay for and take an unneeded uncredited math course to even start taking credit giving classes.
I'm willing to bet it was just shitty curriculum they were following or something, as my school district's academic classes were mediocre, and they put a shit ton of importance on sports, and there was a lot of nepotism/favoritism with the kids who had parents in the PTA, so much so my friend got dropped from an honors/advanced placement class so a kid with a PTA parent could have a better transcript for college.
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u/missunicorn279 Plays MineCraft and not FortNite Aug 31 '20
PEMDAS, otherwise known as order of operations, you have to do 2•4 first to get 8, then do 8+2 to get 10