decimal point: a dot or point that separates the whole number from the fractional part of a number or that separates dollars from cents

decimetre (dm): a unit that is used to measure length or distance

1 decimetre = 10 centimetres

denominator: the lower number in a fraction

Example:

diagonal: slanted from corner to corner

difference: the number left after subtracting one number from another

digit: any one of the ten symbols (0, 1, 2, 3, 4, 5, 6, 7, 8, or 9) used to write numbers

division: the process of sharing a number of items to find how many equal groups can be made or how many items will be in a group

Division is the opposite or inverse operation of multiplication.

equation: a number sentence consisting of numbers and symbols ( + , - ) used to show a mathematical operation

Example: 52 + 36 = 88

estimating: making a close guess or arriving at an answer in round numbers

even number: a number that can be divided by 2 without a remainder

Example: All numbers ending with 0, 2, 4, 6, or 8 are even.

fact family: numbers of related facts, also referred to as a number family

Example: 5 + 6 = 11, 6 + 5 = 11, 11 - 6 = 5, 11 - 5 = 6 are numbers of a fact family.

factor: a number that is multiplied by another number to find a product

Example:

fraction: a number that shows part of a whole or an amount less than 1

gram (g): a unit used to measure mass

horizontal: across, left to right, or right to left

inverse: opposite

inverse: opposite

inverse: opposite

kilogram (kg) (kilo): a unit used to measure mass

1 kg = 1000 g

kilometre (km): a unit that is used to measure longer lengths or distances

1 kilometre = 1000 metres

leap year: a year with 366 days

An extra day is added to February.

linear: in a line or row

litre (L): a unit of measure for measuring how much a container holds or its capacity. It is usually used to measure liquids.

mass: the amount of matter in an object

Matter is what all objects are made from. Mass is measured by weight.

metre (m): a unit that is used to measure length or distance

1 metre = 100 centimetres

millimetre (mm): a unit used to measure shorter lengths, distances, or heights

10 mm = 1 cm

multiple: a number that is the product of a given number multiplied by a whole number such as 1, 2, 3, and so on

Example:

multiplication: the process of finding the total number of items made up by a certain number of equal groups

Example:

2 × 4 = 8

multiplication: the process of finding the total number of items that are in a certain number of equal groups

numerals: the symbol that stands for a number

Example: 1, 2, 3, . . . are numerals for the number concept.

numerator: the upper number in a fraction

Example:

odd number: a number that cannot be divided by 2 without a remainder

Example: All numbers ending with 1, 3, 5, 7, and 9 are odd.

odometer: an instrument that measures the distance a vehicle travels by counting the number of times the wheels go round

operation: a mathematical process or action

Addition and subtraction are mathematics operations.

ordinal number: a number telling order or position

Example: first, second, third

organized list: a list arranged using a system

Numbers arranged from least to greatest or those beginning with the same digit, such as 36, 37, and 38 are examples of organized lists.

pattern: any arrangement of shapes, colours, numbers, and so on that keeps repeating

perimeter: the distance around the outside of an object or figure

Example:

2 cm + 3 cm + 3 cm = 8 cm

The perimeter of this figure is 8 centimetres.

product: the answer to a multiplication problem

quotient: the answer in a division problem

recall: remember instantly

regrouping: renaming or representing numbers using place value for the purpose of doing a mathematical operation

remainder: the number that is left over after dividing into equal groups.

rounding: bringing a number to the next nearest unit

row: grid spaces going across

set: any group of numbers or objects that are the same in some way

Example: The set of even numbers less than 10 includes 2, 4, 6, and 8.

standard unit: a unit such as a centimetre, litre, and kilogram that aids in measuring and is agreed upon by everyone

subtraction: taking one number from another number to find the difference

sum: the number that results from adding two or more numbers together

two-dimensional pattern: a pattern that has both length and width

vertical: up and down

Copyright ©2002, Alberta Learning.