7th Grade Math Vocabulary
Terms in this set (48)
A decimal number that ends or terminates
A decimal that repeats a digit or group of digits forever
____________ are two number that are the same distance from 0 on a number line but they lie in opposite directions.
Operations that are the opposite of each other and cancel each other out. Addition and subtractions are inverse operations, as are multiplication and division
Interest earned only on the original principal amount invested
Interest earned or paid on both the principal and previously earned interest.
two quantities increase at the same rate
The distance a number is from zero on a number line. ALWAYS POSITIVE
a number that can be expressed as a ratio (fraction) of two integers - terminating and repeating decimals are considered rational
a number that cannot be expressed as a ratio of two integers or as a repeating or terminating decimal
Algebraic statements that have ≠, <, >, ≤, or ≥ as their symbols of comparison.
Fractions that have the same value
a comparison of two quantities using division
The ratio of the rise and the run between any two points in a line
constant of proportionality
In a proportional relationship, equations are of the form y=kx, where k is the constant of proportionality
The property that says that two or more numbers can be added or multiplied in any order without changing the result
a(b + c) = ab + ac
order of operations
A rule for evaluating expressions: first perform the operations in parentheses, then compute powers, then perform all multiplication and division from left to right, and then perform all addition and subtraction from left to right.
A chord that passes through the center of the circle
The ratio of the circumference divided by the diameter
The distance around a circle
area of a circle
The part of a circle that looks like a piece of pie. A sector is bounded by 2 radii and an arc of the circle.
volume of a cylinder
surface area of a cylinder
Figures with the same shape but not necessarily the same size are similar.
Comparing the lengths of corresponding sides of similar figures
A transformation that "slides" each point of a figure the same distance in the same direction.
A transformation that "flips" a figure over a mirror or reflection line.
average of the scores - add them up and divide by total number of scores
The middle number in a set of numbers that are listed in order
The difference between the highest and lowest scores in a distribution.
Chart that shows the relationship of a part to a whole
A bar graph depicting a frequency distribution. The height of the bars indicates the frequency of a group of scores.
The set of all possible outcomes
A number from 0 to 1 that measures the likelihood that an event will occur
A ratio that compares a number to 100
the fraction or percent of the time that an event occurs in an experiment
stem and leaf plot
A display of data in which digits with larger place values are "stems" and digits with smaller place values are "leaves."
A value much greater or much less than the others in a data set
lateral surface area
Sum of the surface areas of all the faces of a space figure except the bases
You can convert between the smaller and larger metric units by simply moving the decimal point.
The measurement system often used in the US
adding positive and negative numbers
Change all subtraction to addition by adding the opposite of the number.
multiplying and dividing positive and negative numbers
Same symbols = positive
Different symbols = negative
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