Ultimate Math Refresher
Terms
undefined, object
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 Lengthly calculations are not needed
 simplify arithmetic by cancellation
 divide by 10% or .1 is same as
 mult by 10
 counting problems use
 Venn Diagrams
 compare fractions by

cross multiplication
start at bottom like a weird x, end in top corners  percent =
 part/whole
 whole=
 part/percent
 % change=

amount of change/original amount
all times 100/1  direct proportions:
 vary in the same direction, as one gets larger, the other gets larger
 inverse proportions:

change in opposite directions
the ratio is inverted  a nonzero number raised to the 0 power =
 1
 number raised to the 1st power
 that number
 fraction or decimal of a value between 0 and 1 raised to a positive power
 becomes smaller
 10 raised to a positive power equals
 1 plus as many 0's as the exponent number
 a number raised to the 1/2 power equals
 the square root of the number
 number raised to 1/3 power equals
 the cubed root of that number
 a negative number in parentheses raised to an even power=
 a positive number
 part (is) =
 percent x whole (of)