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Number and Operations
Hundredth- One of one hundred parts .01 or 1/100.
Difference- The answer to a subtraction problem
Thousandth-One of one thousand parts .001 or 1/1000
Compatible numbers- Numbers that are easy to compute mentally
Equivalent- Having the same value, equal
Hundred thousand- 100,000
Round- Relacing a number with one that tells about how much of how many
Basic fact- A multiplication fact, such as 3x5
Benchmark-A familiar number used as a point of reference
Decimal point- A symbol used to separate dollars and cents
Estimate- Find a number that is close to an exact amount
Factor- A number multiplied by another number to find a product
Mixed number- A number represented by a whole number and a fraction
Multiple- The product of two given whole numbers
Product- The answer to a multiplication problem.
Quotient- The answer to a division problem
Tenth- One of ten equal parts .1 or 1/10
Measurement Vocabulary
Millimeter- a metric unit for measuring length (mm) 0.001 meters
centimeter-a metric unit for measuring lenfth (cm) 0.01 meters= 1 centimeter
meter- one meter equals 39 inches and 100 centimeters
kilometer- (km) Equal to a thousand meters
gram- (g) measures mass
kilogram- (kg) One thousand grams
ounce - (oz) measures weight
pound- (lb) measures weight
milliliter- (mL) measures capacity
liter- (L) measures capacity ( a little bigger than a quart)
cup- (c) measures capacity
gallon- (gal) measures capacity (4 quarts equals 1 gallon)
angle - a figure formed by two rays that meet at a common end-point.
area- the number of square units needed to cover the surface
base- a polygon's side or a solid figure's face
degree- a unit for measuring angles or temperature
height- the length between the bottom and the top of a figure
perimeter- the distance around a closed figure
protractor- a tool used for measuring or drawing angles
vertex- the point where two or more rays meet
Geometry Vocabulary
Line symmetry- when you can divide a shape into two congruent parts
Rotational symmetery- Rotate a shape around a point with a line
Equilateral-All sides of a triangle are equal
Isosceles- A triangle with exactly two congruent sides
Parallelogram- A quadrilateral with opposite sides parallel and congruent
Rectangle- A parallelogram with all right angles and opposite sides congruent
Reflection- a movement of a figure by flipping it.
Scalene- A triangle with no congruent sides
Similar- Two polygons that are the same shape, but different sizes
Square- A polygon with four equal sides and 90 degree angles
Translation- A movement of a shape by sliding it across a straight line.
Trapezoid- A quadrilateral with two parallel sides.
Congruent- Having the same size and shape.
Data Analysis and Probability
bar graph- A graph that uses bars to represent data
circle graph- a graph that show how parts of data relate to whole.
line graph- A graph that uses a line to show change over time.
mean- The average of a set of data
median- the middle number of a set of data that is in order
mode- the number that occurs most often in a set of data
outlier- A value separated from the rest of the data.
pictograph- A graph that shows information by using pictures.
population- The entire group of people considered for a survey
random sample- a sample of each population
range- the difference between the larges and smalles number in a set of data
sample- a part of a population
stem-and-leaf plot- A table that shows data by place value
survey- a method of gathering information about a group
Algebra
variable- A letter or symbol that represents a number
inequality- A number sentence that contains symbols
expression- a number sentence that contains
equation- a sentence that shows two quantities are equal
equal- when two numbers are the same