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Math
Ratios, Rates, and Fractions
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Cards (26)
Ratio
Comparison of two quantities that have the
same
units
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Ways to write a ratio
Fraction
form
Word
form
Colon
form
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To figure out a ratio
1. Write it in
fraction
form
2.
Simplify
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Rate
Comparison of quantities that have
different
units
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Unit rate
A rate with a
denominator of 1
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Unit
price
A
unit rate
related to a
price
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Whole number
A number that isn't a
fraction
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Numerator
The
top
of a fraction
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Denominator
The
bottom
of a fraction
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Improper fraction
When the
numerator
is
larger
than the denominator
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Mixed number
A
fraction
that
includes
a whole number
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Adding/subtracting fractions (same denominator)
Add/subtract the
numerators
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Adding/subtracting fractions with different denominators
1. Find the least
common
denominator
(
LCD)
2. Multiply the
numerators
and
denominators
by the denominator's factor pair number
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Simplifying fractions
Find the
greatest
common
factor of the numerator and
denominator
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Multiplying
fractions
1.
Multiply the numerators with
each
other
2. Multiply the
denominators
with
each
other
3. Simplify the answer by finding the
GCF
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Dividing fractions
1. Change the problem to
multiplication
and integrate the
reciprocal
2.
Simplify
the answer
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Changing a mixed number to an improper fraction
1.
Multiply
the
denominator
by the
whole
number
2. Add the
numerator
then write it over the denominator
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To perform operations involving a fraction/mixed number and whole number, give the
whole
number
a denominator of
one
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If the result of an operation that involves a fraction is an improper fraction, change it to a
mixed
number
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Reciprocal
Flip the
numerator
and
denominator
of the second fraction
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Multiplying Mixed Numbers
1. Convert them into improper
fractions
2. Multiply the
numerators
with each other and the
denominators
with each other
3. Write as a
mixed
number
and
simplify
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Dividing Mixed Numbers
1. Convert them into improper
fractions
2. Integrate the
reciprocal
and multiply
3. Write as
mixed
number
and simplify
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Adding Or Subtracting Mixed Numbers
1. Convert them into
improper
fractions
2. Find the
least
common
denominator
3.
Multiply
the numerators and denominators by the denominator's
factor
pair
4.
Add
or
subtract
5. Write as a
mixed number
and simplify
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To find ratios
Divide the
numerator
and denominator by the
same
number
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Equivalent ratios
Ratios that when you
simplify
them equal the
same
thing
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Commonly used fractions are called
benchmark fractions
, like 1/2.
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