Download Common Core 4th Grade Math Vocabulary

Common Core
4th Grade
Math
Vocabulary
Fractions and
Decimals
decimal- A number with one or more
digits to the right of the decimal point
Example: 3.47
decimal fraction- A decimal fraction is
a fraction where the denominator (the
bottom number) is a power of ten
(such as 10, 100, 1000, etc).
43/100 is a decimal fraction and it can
be shown as 0.43
decimal point- A symbol used to
separate dollars from cents in money
and to separate the ones place from
the tenths place in decimals
Example: 342.78
Mixed Numbers-
denominator- The number below the
bar in a fraction. It tells how many
equal parts are in the whole.
Example: 5
8 denominator
equivalent fractions- Two or more
fractions that name the same amount
Example: 1 =
2
2 =
4
Equivalent fraction
3
6
factors- A number that is multiplied
by another number to find a product
Examples:
4 x 7 = 28
The factors are 4 and 7.
improper fraction- A fraction where
the numerator (the top number) is
greater than or equal to the
denominator (the bottom number). In
other words, it is top-heavy.
Example: 5/3 (five thirds) and 9/8 (nine
eighths) are improper fractions
mixed number- A number represented
by a whole number and a fraction
Example: 2 ½
4¾
Hundredth- One part of something
divided into 100 equal parts. 1/100th
Example: 1 penny is a hundredthth of
1 dollar
numerator- The number above the bar
in a fraction that tells how many parts
of the whole are being considered
Example: 4 numerator
5
proper fraction- A fraction where the
numerator (the top number) is less
than the denominator (the bottom
number).
Example: 1/4 (one quarter) and 5/6
(five sixths) are proper fractions.
-
tenth- One part in a ten equal parts.
1/10th
Example: 1 dime is a tenth of 1 dollar
unit fraction- A fraction where the top
number (the "numerator") is 1
Example: 1
4
1
6
1
8
whole number- One of the numbers 0,
1, 2, 3, 4, . . . The set of whole
numbers goes on without end.