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MCA-III 7th Grade Math Vocabulary
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Terms in this set (52)
rational number
Any number that can be written as a fraction
(includes terminating and repeating decimals)
integer
All whole numbers (both positive and negative) and zero.
fraction
A number that names part of a whole.
decimal
a number that uses place value and decimal points to show values less than one, such as tenths, hundredths, etc.
terminating
A decimal number that ends or stops
repeating
a decimal that keeps going with same digit, or group of digits
opposites
Two numbers with the same absolute value but different signs (-5, and 5)
origin
(0,0) The central point on a grid.
inverse
A mathematical operation that is the opposite of another operation. For example, addition and subtraction.
simple interest
The amount of interest based on a principal amount and not on earned interest.
compound interest
Interest earned on both the initial principal and the interest reinvested from prior periods.
proportion
It states that two ratios are equal. It can be written as two equal fractions.
absolute value
The distance a number is from zero on a number line. ALWAYS POSITIVE
slope
steepness of the line or rise over run, the change in y over the change in x
inequality
A mathematical sentence that contains less than, greater than, less than or equal to, greater than or equal to, or not equal
simplify
To write a fraction or expression in smallest numbers or terms
evaluate
Provide an answer to the question.
substitute
replace a variable with its given value
ratio
A comparison of two numbers by division
They can be shown in 3 different ways. 4/1, 4 to 1, and 4:1
radius
The distance from the center to the circumference of a circle
conversion
A change in the form of a measurement, different units, without a change in the size or amount. 10mm =1 cm
transformation
Changing a shape using:
• Turn (Rotation)
• Flip (Reflection)
• Slide (Translation)
diameter
A straight line passing from side to side through the center of a circle or sphere.
circumference
The distance around a circle.
cylinder
3D figure with two parallel congruent circular bases and a curved lateral surface that connects the bases
similar
Two figures are the same shape (corresponding parts, sides and angles), but different size.
corresponding parts
The sides and angles of similar figures or congruent figures
scale factor
The ratio of any two corresponding lengths in two similar geometric figures.
image
the new points after a transformation
stem and leaf plot
A display of data in which digits with larger place values are on the left side of the line and digits with smaller place values are on the right side of the line
relative frequency
The fraction or percent of time that the event occurs.
circle graph
A data display that uses pieces of a circle to show parts of a whole.
histogram
A graph of vertical bars representing the frequency distribution of a set of data.
frequency table
A table for organizing a set of data that shows the number of times each item or number appears.
Inversely Proportional
A relationship between two variables in which the product is a constant. When one variable increases the other decreases in proportion so that the product is unchanged.
Proportional
When two quantities always have the same size in relation to each other. In other words, they have the same ratio.
Coordinate
The pair of numbers giving the location of a point (ordered pair)
Lateral Area
The sum of the areas of all sides of a prism or cylinder, but not including the top or bottom base.
Outlier
A data point that is distinctly separate from the rest of the data.
Reciprocal
When the fraction a/b is changed to b/a
Percent
One part in every hundred or per one hundred
Exponent
a quantity to which a given number or expression is to be raised
Power
tells you how many times to use a number in repeated multiplication, includes the base and the exponent
base
the number that is raised to a power
ordered pair
two numbers written in certain order, usually written as (x, y)
x-axis
the horizontal line on the coordinate grid that runs through the origin
y-axis
the vertical line on the coordinate grid that runs through the origin
unit rate
The cost per liter, per kilogram, per pound, etc, of what you want to buy.
function
a special relationship where each input has exactly one output
order of operations
The rules that say which calculation comes first in an expression. PEMDAS
probability
the chance that something will happen - how likely it is that some event will occur
frequency
How often something happens (usually during a period of time)
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