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17 Cards in this Set
- Front
- Back
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Lengthly calculations are not needed
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simplify arithmetic by cancellation
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divide by 10% or .1 is same as
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mult by 10
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counting problems use
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Venn Diagrams
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compare fractions by
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cross multiplication
start at bottom like a weird x, end in top corners |
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percent =
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part/whole
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whole-=
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part/percent
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% change=
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amount of change/original amount
all times 100/1 |
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direct proportions:
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vary in the same direction, as one gets larger, the other gets larger
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inverse proportions:
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change in opposite directions
the ratio is inverted |
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a non-zero number raised to the 0 power =
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1
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number raised to the 1st power
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that number
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fraction or decimal of a value between 0 and 1 raised to a positive power
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becomes smaller
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10 raised to a positive power equals
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1 plus as many 0's as the exponent number
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a number raised to the 1/2 power equals
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the square root of the number
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number raised to 1/3 power equals
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the cubed root of that number
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a negative number in parentheses raised to an even power=
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a positive number
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part (is) =
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percent x whole (of)
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