Intro Questions: Eight Coins
I've got an old school scale and 8 coins I bought on the internet. I know one of the coins is counterfeit and lighter than the others, but the rest are all the same. How many times must I use the old school scale before I know which coin is counterfeit?
Fermi Estimation:
Order of operations:
so what it the order that you know?
PEMDAS
BODMAS
GEMS
How did it come about?
because. seriously.
that being said, let's think what the structure DOES:
grouping (parenthesis)--"hey, this is more important! look over here!"
exponents (I represent multiplication--which you are going to next--but don't use the number. Let's uncomplicate that"
multiplication and division. Same thing, really. though multiplication can be considered iterated addition
what is division? how is it different than a fraction?
addition and subtraction ... same thing again!
Possible Issues With Fractions
Dividing by zero (not a great idea)
Multiplying Fractions
Dividing Fractions
Adding/Subtracting Fractions
Solving Literal Equations
Start with an easy equation: 3x+5=11 . This even ends in a whole number to make you happy.
Now let's go to 3x+y=11