| Vocabulary words for week of 12/1/08
Grade 8
polygon
A simple closed figure in a plane formed by three or more line segments.
octagon
A polygon having eight sides.
quadrilateral
A polygon having four sides.
triangle
A polygon having three sides.
pentagon
A polygon having five sides.
Grade 8
Vocabulary Words for week of November 10, 2008
acute angle
An angle with a measure greater than 0° and less than 90°.
obtuse angle
An angle that measures more than 90° but less than 180°.
straight angle
An angle that measures 180°
right angle
An angle that measures exactly 90°.
Vocabulary words for Grade 8
Week of November 3, 2008
positive integer
Any integer that is greater than zero
positive number
Any number that is greater than zero
negative integer
Any integer that is less than zero.
negative number
Any number that is less than zero.
zero pair
The result of a positive counter paired with a negative counter
Vocabulary Words for Week of 10/27
exponent
A number that indicates how many times a number or expression is to be
multiplied by itself. Example: In the expression 53, the exponent is 3.
power
An expression of the form xn, read x to the nth power. Example: 74 is 7
raised to the fourth power, or 7 x 7 x 7 x 7.
zero exponent
For any nonzero number a, a0 = 1.
order of operations
1. Evaluate expressions inside grouping symbols.
2. Evaluate all powers.
3. Do all multiplications and/or divisions from left to right.
4. Do all additions and/or subtractions from left to right.
open sentence
A mathematical statement with one or more variables.
Vocabulary Words for Week of 10/20
evaluate
Find the value of an expression.
solution
A replacement value for the variable in an open sentence. A value for the
variable that makes an equation true. Example: The solution of 12 = x + 7 is
5.
open sentence
A mathematical statement with one or more variables.
identity
An equation that is true for every value of the variable
independent variable
The variable in a function whose value is subject to choice.
Vocabulary Words for Grade 8 week of 10/13
1. absolute value The distance from 0 to a number, n, on a number
line (e.g., , , and ).
2. algebra The branch of mathematics that uses letters, symbols, and/or
characters to represent numbers and express mathematical relationships.
3. algebraic Making use of or referring to concepts or methods of
algebra.
4. algebraic expression A mathematical phrase that is written using one
or more variables and constants, but which does not contain a relation symbol
( ) (e.g., 3y + 6).
5. algebraic relationship To express the relationship between two or
more numbers using an algebraic expression.
Vocabulary Words for week of October 6th
Grade 8
1. Numerical expression – is simply a name for a number
2. Variable expression – is an expression that contains a variable
such as 100 x n
3. Evaluating the expression – finding the value of the expression
4. Numerical Coefficient – the number 3 is the numerical coefficient of
ab, in an expression such as 3ab
Vocabulary for week of September 29
1. EVALUATE- Find the value of an expression.(solve)
2. VARIABLE- A letter or other symbol used to represent an unspecified
number or value.
3. TERM-A number, a variable, or a product or quotient of numbers and
variables
4. EXPRESSION-A mathematical combination of numbers, variables, and
operations. Examples: 5 + 23, 4x, 6x + y2
5. CONSTANT- A term that does not contain a variable.
Vocabulary for week of September 22
1. ADDEND- A NUMBER THAT IS ADDED TO ANOTHER NUMBER TO FIND A SUM IS
CALLED AN ADDEND. In 4 +6 = 10, 4 and 6 are addends and 1 is the sum
2. DIFFERENCE- THE AMOUNT THAT IS LEFT AFTER ONE NUMBER IS SUBTRACTED
FROM ANOTHER IS CALLED THE DIFFERENCE. In 11-6= 5, 5 is the difference.
3. PRODUCT- THE AMOUNT THAT RESULTS FROM MULTIPLYING TWO OR MORE NUMBERS
TOGETHER IS CALLED THE PRODUCT. In 2x3=6 6 is the product and 2 and 3 are the
factors.
4. QUOTIENT- THE AMOUNT THAT RESULTS FROM DIVIDING ONE NUMBER BY ANOTHER
IS CALLED THE QUOTIENT. In 14 / 2 = 2, 2 is quotient 14 is the dividend and
7 is the divisor.
5. SUM- THE RESULTS OF ADDING TOW OR MORE ADDENDS IS CALLED THEIR SUM.
In 2+4=6 6 is the sum, 2 and 4 are the addends.
Vocabulary words for week of 9/15
Some common word phrases translated into mathematical expressions.
+
added to
the sum of
plus
more than
increased by
-
subtract
the difference of
minus
less than
decreased by
subtracted from
x
multiply
the product of
times
twice
÷
divide
the quotient of
half
=
is
is the same as
is equal to
the result is
Vocabulary words for week of 9/8
„X > greater than (more than)
„X < less than
„X > greater than or equal to
„X < less than or equal to
„X ¡Ú not equal to
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