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### 17 Cards in this Set

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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 non-zero 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)