irregular polygons

Polygons with sides of different

lengths.

inscribed polygon

A polygon, all of whose vertices are points on a circle or other

figure.

isosceles triangle

A triangle in which two of the three sides are

the same length.

juxtapose

To place side by side in an expression to indicate multiplication.

5n means 5 * n

ab means a * b

key sequence

A set of instructions for performing a particular calculation or function with a calculator.

14 [+] 37 [=] 51

kilogram (kg)

Measures the unit of

mass.

kilometer (km)

A unit equal to 1,000 meters.

1 kilometer is equal to 11 football fields

kite

A quadrilateral with exactly two pairs of adjacent congruent sides.

kite

A quadrilateral with two pairs of

adjacent sides that are the same

length.

label

Descriptive word or phrase used to put numbers in

context.

24 children27 ducks

30 cents

3 o’clock

1 kg

landmark

Numbers that are familiar and can be used to solve other

unfamiliar problems.

landmark

A measure of data.

medianmode

maximumminimum

range

least common

denominator

The least common multiple of the

denominators of every fraction in

given collection of fractions.

least common multiple

The smallest that is a multiple of two or more

numbers.

leg of a right

triangle

A side of a right triangle that is

not the hypotenuse.

length

The longer side of a rectangle

or a rectangular

object.

line

A straight path that extends infinitely in

opposite directions.

line graph(broken-line

graph)

A graph in which points are

connected by a line or line segment to

represent data.

line of

reflection (mirror line)

A line that divides a figure into tow halves that re mirror

images.

line of symmetry

A line that divides a figure into two halves that are mirror

images.

line of symmetry

A line through a symmetric figure. Each

point is one of the halves of the figure is

the same distance from this line as the

corresponding point in the other half.

line symmetry

A figure has line symmetry if a line can be drawn through the figure that divides into two parts so that both

parts look exactly alike, but facing in opposite

directions.

line plot

A sketch of data in which checkmarks, X’s

or stick-on notes above a number line

show the frequency of each value.

Nu

mb

er

of

child

ren

0 1 2 3 4 5X X X X X

X X X X X

X X

line segment

A straight path joining two

points called endpoints of the

line segment.

liter (L)

A unit of capacity equal to 1,000

milliliters. A liter is larger than a

quart.

long

The base-10 block

consisting of 10 cm cubes.

map legend

A diagram that explains the

symbols, markings and colors on a

map. Also called a map key.

map scale

A rate that compares the

distance between two locations on a

map with the actual distance between

them.

Math Boxes

Review problems and practice

skills.

Math Journal

Student books used to practice and learn

skills.

Math Message

Actives to start at the beginning of the math lesson.

1.1

Math Message 1.1 We are going to mark school days on a number line.Where would you mark today on the number line?

mathematics

A study of relationships among numbers, shapes, systems, and patterns. It is used to count, measure

things, to discover similarities and

differences between them, to solve problems, and to learn about and organize

the world.

maximum

The largest amount; the

greatest number in a set of data.

{3, 2, 8, 1, 9, 2} is 9

measurement unit

The reference unit used when measuring

length, weight, capacity, time or

temperature.

mean

A typical or middle value for

a set of numbers. It is the average.

2, 4, 5, 9, 10 = 3030 ÷ 5 = 6

The mean is 6

median

The middle value in a set of data

when the data is listed in order.

2, 35, 65, 77, 80, 100, 205

memory

Mechanical or electronic storage of

information for later recall.

memory keys

Keys to manage a

calculator’s memory.

memory key

The [M+], [M-], and [MRC] calculator keys. The [M+] key is

used to add a number to the number stored in the

calculator's memory; the [M-] key is used to subtract a

number from the number in memory. The [MRC] key,

pressed once, displays the number currently stored in memory; when the key is

pressed twice, the calculator's memory is cleared.

mental arithmeti

c

Math done in their own

head.

2 + 3 = 5 2X3=6

Mental Math and Reflexes

Oral lessons to strength children's

number sense and to review and advance

essential basic skills.

meridian bar

A device on a globe that

shows degrees north and south of the equator.

meter (m)

Measurement of length.

10 decimeters 100 centimeters1000 millimeters.

metric system

Measurement based on base-ten system.

metric system

A measurement system based on

the base 10 numeration system and used in most countries of the

world.

middle value

The number in the middle when a set

of data is organized in

sequential order.

2, 35, 65, 77, 80, 100, 205

midpoint

A point halfway

between two points.

mile (mi)

Unit of length. 5,280 feet

1,760 yards1,509 meters

1 mile = 22 football fields

milliliter (mL)

Metric unit of capacity.

1/1000 of a liter.

millimeter (mm)

Metric unit of length. 1/10 of a centimeter.

minimum

The smallest number in a

set.

{3, 2, 8, 1, 9, 2} is 1

minuend

The number you start with

when you subtract.

mixed number

A number that has a whole

number part and a fraction part.

mode

The value that occurs most often in a set

of data.

3,4,4,4,5,5,6

mode

multiples

Repeated groups of the same amount.

5’s5, 10, 15, 20 10’s

30, 40, 50, 60

25’s75, 100, 125

multiplication

The operation used to find the total number in several equal

groups.

7 X 2 = 14

multiplication fact

The product of two 1-

digit numbers.

2 x 3 = 6

4 x 0 = 0

9 x 3 = 27

8 x 8 = 64

multiplicative inverses

Two numbers whose products is 1.

Multiplicative inverses are also called

reciprocals of each other.

multiplications/division diagrams

The diagram has a number of groups, a

number in each group and a total

number.

4 x 3 = 12

name-collection box

A boxlike diagram tagged with a given number and used for

writing the names for that number.

negative number

A number less than 0;a number to the left of the 0 on a

horizontal number line.

negative rational numbers

A number less than 0 that can be written as

a fraction or terminating or

repeating decimal.

-4-0.333…

-4/5

n-gon

All other polygons can be called n-gons. You can

think of n-gons as meaning "any" number of sides, or whatever number of sides your current polygon has.

net score

The final score of a turn or game after

any operations have been done.

In the game of Factor Captor, your first move is 29, your opponent's move is 1. You get your net score, 28, by subtracting 1 from 29.

nonagon

A polygon that has nine sides and nine angles, more properly

(but less often!) called an enneagon.

A regular nonagon has nine equal sides and nine equal

angles.

number family

A triplet of numbers with two addends and their sum or two factors and their products.

3 x 5 = 155 x 3 = 1515 ÷ 3 = 515 ÷ 5 = 3

3 + 5 = 85 + 3 = 88 - 3 = 58 - 5 = 3

8

3 5+,-

15

5 3x,÷

number-grid

A table with consecutive

numbers arranged in rows

of ten.

number-grid puzzle

A part of the number grid with numbers missing.

number line

A line on which points

correspond to numbers in

order.

number model

A number sentence that

models or fits a situation.

Sara has three round blocks And 2 square blocks. How many blocks in all?

3+2=5 blocks

number model

number model

A number sentence that shows how the

parts of a number story are related.

Sara has three round blocks And 2 square blocks. How many blocks in all?

3+2=5 blocks

number model

number scroll

Number-grid pages taped

together.

number scroll

Multiple number-grid pages taped

together.

number sequence

A list of numbers often generated by

some rule.

number sentence

A sentence that is made up of

numerals and a relation symbol

(=,<,>)

2 + 3 = 5

894 < 1234

23 X 2 > 20

(10 - 4) X 5 = 30

number story

A story that can be solved using one or more math operations.

numerator

The number written above the line in a

fraction.

14

numerator

obtuse angle

An angle greater than 90 degrees

and less than 180 degrees.

octagon

An 8-sided polygon.

1 2

3

45

6

7

8

odd number

A number that can not be

divided by 2. It has

1, 3, 5, 7, or 9 in the ones

place.

0 ^ 2 ^ 4 ^ 6 ^ 8 ^ 10^121 3 5 7 9 11

odd numbers

even numbers

ONE

A way of showing the unit whole in part-whole fractions.

1-facts

The sum of two 1-digit numbers where one of the numbers

is one.

3 + 1 9 + 1

0 + 1

4 + 1

2 + 1

1 + 1

7 + 1

6 + 1

5 + 1

operation

An action preformed on one or two numbers

producing a single number result.

2 + 5 = 7

2 X 1 = 229 – 8 = 11

12 ÷ 2 = 6

operation

Addition, subtraction, multiplication, division, raising to a power, and

taking a root are mathematical operations.

opposite of a number

A number that is the same distance from zero

on the number line as the given number but

on the opposite side of the zero.

ordered number

pair

Two numbers in specific order used to locate a point on a coordinate grid.

orders of magnitud

e

Powers of ten.

orders of operation

Rules that tell the order in which

operations should be done.

ordinal numbers

A number used to express position

or order in a series.

origin

The point where the x-axis and y-axis

intersect on a coordinate grid.

ounce (oz)

A standard unit of weight equal

to 1/16 of a pound.

10 pennies = 1 oz

160 pennies = 1 pound

outcome

A possible result of a

random process.

Head and tails are two outcomes from flipping a coin.

pan balance

A device used to weigh

objects or compare weight.

parabola

The curve formed by the surface of a right

circular cone when it is sliced by a plane that is parallel to a side of the

one.

parabola

A parabola can also be described as the curve from a line and a point that is not on the line.

parallel

Lines, rays, line segments, or planes

that are equal distance at all

points, no matter how far; never

meeting.

parallelogram

A quadrilateral that has two pairs of

parallel sides and opposite sides that

are congruent.

part-and-total

diagram

A diagram used with problems in with two or more

quantities are combined to from a

total quantity.

part-to-part ratio

A ration that compares a part of the whole to another part of the

whole.

Part to part compares the red circles to the yellow circles. Part to part ratio is 2:5

part-to-part whole

ratio

A ratio that compares a part of the whole to the

whole.

Part to total compares the red circles to the total amount of circles, 2:7 or you can compare the yellow circles to the total

amount of circles, 5:7