This document defines key mathematical terms related to fractions, decimals, percentages, ratios, statistics, and probability. It provides concise explanations of parts, wholes, numerators, denominators, common denominators, proper and improper fractions, mixed numbers, decimals, ratios, percentages, data, statistics, averages, means, modes, ranges, medians, minimums, maximums, intervals, and probability.

1. Part
a piece of a whole
Part
Whole

2. Divide
to separate into parts

3. Fraction
names a part
of a whole

4. Half
one of two equal parts

5. Third
one of three equal parts

6. Quarter
one part of four equal parts

7. Numerator
the number
above the fraction line,
to show a number of parts in a
whole

8. Denominator
the number
below the fraction line,
to show the number of equal
parts that the whole is divided

9. Common
denominator
having the same
denominator

10. Lowest terms
A fraction is in simplest form when the
top and bottom cannot be any
smaller.
To simplify a
fraction, divide
the top and
bottom by the
highest number
that can divide
into both numbers
exactly.

11. Equal
having the same
value, size, or
number

12. Equivalent fractions
different fractions
that have the same value

13. Proper Fraction
a fraction less than one,
with the numerator
less than the denominator

14. Improper fraction
a fraction whose numerator
is greater or equal to its
denominator

15. Mixed Number
a number that has both
a whole number and
a fraction

16. Tenth
one of 10
equal parts

17. Hundredth
one of 100
equal parts

18. Thousandth
one of 1,000
equal parts

19. Decimal
a fraction whose denominator
is a power of ten

20. Ratio
a relationship
between two items

21. Percentage
a rate or amount in a 100
Percent (%)

22. Data
information
collected
to be
studied

23. Statistic
a piece of
data from a
big quantity
of
information

24. Analyze/
Analyse
to study
something
closely
and
carefully

25. Interval
a group of numbers in
between two ordered points
Intervals

26. Average
a typical or central value
of a set of numbers;
sum of a data set divided by
numbers in the set

27. Mean
the average
of a data set
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28. Mode
the value or
values that
appear most
in a data set
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29. Range
the difference
between the
maximum
(biggest) and the
minimum
(smallest) value in
a set of data
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30. Median
the middle
value
in a data set
ordered
from smallest to
largest
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31. Minimum
the smallest
amount
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32. Maximum
the largest
amount
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33. Probability
the chance that something
will happen