See also the Dr. Math FAQ: order of operations 3D and higher
Browse Middle School Algebra Stars indicate particularly
interesting answers or good places to begin browsing. Selected
answers to common questions: Direct and indirect variation.
Inequalities and negative numbers. Positive/negative integer
rules. Solving simple linear equations. - Formulas for the
Equation of a Line [09/28/1998] Can you explain the meaning
behind the point-slope formula? What about other formulas for
the equation of a line? - Four Methods of Solving Classic
Chicken and Egg Problems [02/24/2009] If 6 cats can kill 6 rats
in 6 minutes, how many cats will it take to kill 100 rats in 50
minutes? A look at four different solution methods for this sort
of problem. - The Fourth Dimension [8/24/1995] What is the
fourth dimension mathematically? - Fraction: Algebra without the
Equations [8/23/1996] I have come up with a way to solve
fraction problems like "2/3 of ? = 66", but I have no idea why
it works. - Fraction Equation Problem [5/10/19