We now have a math dictionary we can use in our class in addition to the glossary of our math books! Here are some important words we have learned so far!!

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